It's going to cost more than $50-60 for the trip to Bird Island. Del Mar Charters is HIGHLY recommended. Capitan Oscar is the ABSOLUTE BEST. Smaller boat, personalized service, burritos, drinks (alcoholic and non). $85.00 per person. Leaves the marina at 8:45 in the morning. Must have at least 6 people to go out. Only other choice I know of is EcoFun. Huge boat - lots of people = slower. $99.00 per person, less time at Bird Island because it takes longer to get there and back. Leaves at 6:30 in the morning (no thanks). Not sure about this part, but I think the boat is too large to get in close enough and you have to get in a raft to take you closer to swim with the sea lions.
Del Mar Charter = is like having a friend with a private boat.
EcoFun = Cattle Car.