Let me give you what you're looking for. No disrespect to Joe; he fishes from a kayak or jetski (mostly) and the kid's gotta lotta go get'em! Kudos for that.
First, a little about my fishing resume. I've been fishing the Sea of Cortez, Baja, and the Pacific coast for over 40 years. Everything from beach camping in very remote places to big game tournaments, even fishing the Mexican Governor's Cup in Mazatlan. I've had two boats - a 23' Baja Bayrunner and a 30' ProKat, but am currently boatless hoping to buy a 28' center console in the future to continue my fishing adventures. I still fish when I can with friends that have boats. I also design and sell top end trolling lures, some of which have taken 1st place in big game tournaments. I'll post some pics at the end of this reply.
If trolling is your thing, Penasco is not where you want to be. Can you catch fish trolling out of Penasco? Yes, but only at certain times of the year (at least for big game). You can troll Rapalas around the island and shallower reefs and scratch up some sierra, sardineros, and ladyfish. From late May to July or so (depending on water temps) you can head south and find blue water and occasionally catch dorado, sailfish, skipjack and yes, even a marlin. But due to the Sea of Cortez being so so shallow in and around Rocky Point, once the water temps get into the high 80s and 90s, it becomes a trolling desert. There's simply nothing around to catch; the game fish head back south to deeper/cooler water.
The surface water temps don't affect the reef dwellers. If you can stand the heat, July is premier for catching big grouper. Sabiki up some bonefish south of the harbor, throw'em in the live well, and head out to the 18, 22, or other reef and you can have battle royale with the big ones. You need special rigs to do this that aren't commercially available; but once you know how to make them, they kick ass for grouper. Also, you need rods/reels that have a huge backbone. I've had 130lb. rated rods snap like toothpicks from a grouper strike and drop unsuspecting fishermen to their knees on the rail, even though I warned them to be ready when they hit bottom.
From October to April, the deep reefs rock. Halibut, yellowtail, snapper, black seabass, white seabass, pinto bass and usually an unlimited supply of gold spotted bass. Right now is prime for white seabass and we've nailed some going 40 lbs. The problem with the deep reefs is that they're not close. The 51 is about 47 miles out of the harbor at Penasco which makes for a long boat ride to get there and get back and the winter days are shorter. Plus, due to the huge tide swing (up to 23 ft. at peak times), you're timing has to be spot on or you won't be able to hit or keep your line on the bottom even with 24 or 32 oz. of weight. Not to mention line tangles if you're fishing with a few guys. 1st or 3rd quarter moon is really the only time you want to fish the deep reefs. New or full moon? Simply too much current to fish in water that runs 250 to 300 ft. deep. So there's a lot of planning involved to be successful at this. Still, there's nothing like a full fishbox day on the 51. You'll need heavy weights, deep drop rigs and most of us use electric reels because it's a lot of reeling when your bait gets stripped. You usually get hit pretty quickly after dropping and if you miss it, you're likely "gringo fishing" with no bait. You can jig the deeper reefs with a good degree of success. Shawno is a master at this and his fishing pics are legendary here. You can probably dig up some of his reports here with a search, although he hasn't posted here in awhile and is mostly on Facebook.
In a nutshell, those are your choices if you put your boat in Rocky Point. So, what other options are there? If I had a Hatteras your size, I'd put it in Marina San Carlos. I've fished a lot out of San Carlos over the years and it's got a lot going for it if you have a bigger boat. The marina itself is nice, big, secure and has its own fuel dock. Something Penasco does not have. There is a fuel dock in Penasco; but I always trailered and fueled at a Pemex, so I have no idea how it works there. San Carlos is very comfortable, beautiful and lots of nice places to stay. We would generally rent a nice casita for a week or so, trailer the boat down, and get a guest slip in the marina. There are lots of ex-pats there and a pretty good community overall. Plus, Guaymas is right next door if you need parts or other things. You will need import paperwork for your boat to stay in the marina there, but I assume you already have it if your docked in Ensenada. I really have no idea of current slip prices or availability there, but they have added some nice bigger slips over the years. Check their website here:
https://marinasancarlos.com/
Fishing out of San Carlos is blue water just minutes after leaving the harbor. Drop those flat lines, set the outriggers and away you go. May thru October is great for dorado, sails and marlin. They even get decent yellowfin tuna runs. Winter tends to be yellowtail fishing near the island. But the other thing that's great is you can easily head straight over to Baja and fish Tortuga Island or even further south to Loreto is well within your range. We've had some great fishing days over on the Baja side. If you've got family and kids, snorkeling/diving around San Carlos is great, too, much better than anywhere near Penasco. It's a much better launching point near the middle of the Sea of Cortez if you are planning on doing any cruising and a good homeport. Realistically, you could go to La Paz or Cabo in a couple of days or head north to the Midriff Islands in a day. Lots of options available to you.
I don't know where you currently live. But Guaymas does have an airport to fly in. Driving there from the Phoenix area is about 10 hours; it's a full day of driving. But in the long run, I think you'd be a lot happier homeported in San Carlos than you would in Penasco with your size Hatteras.
As always, I'm available for questions or advice. PM me as you feel the need.
And oh!! Pictures!!!
Lures I made and sold for the Cantina Cup Tournament in San Carlos, closeup of some with actual logo for eyes.
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Fish, Fish, Fish. It's what it's all about.
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