Looking for route/camping help. (Utah, Vegas, California..)

Thanks so much for the great tips! I really appreciate it! We're hoping to travel in April, and beat the Easter rush for the hot spots. Our kids are pretty young, so Disney etc are big draws for us.

We are not members of any organizations at this time. Not sure if we'll actually stay in Monterrey, we really just want to spend some time at the aquarium, so could carry on for a few hours after our visit.