Our family will be traveling to Puerto Penasco (and Mexico) for the first time June 19-26. We will be staying for 7 days (longer than 72 hours) and only traveling between Sonoyta – Puerto Penasco. I have seen conflicting information regarding the Tourist Card, particularly as it applies to the Sonoran "Free Zone." Is an FMM required for our length of stay? If so, I have read where there is no charge for the FMM if staying 7 days or less. Is that correct? Just trying to figure out the process and also the budget for a family of five if we are required to obtain an FMM upon crossing the border. Any clarification would be most helpful. Thanks and God bless.