I forgot to mention that this trip is over the memorial day weekend in May. The issue with that is going to be campgrounds are probably deserted, too cold for outdoor swimming, and other kids will be in school.
I'll probably have to revise my ride times, but since we do plan on taking a couple of long day trips before hand and even an overnighter, I should have a good idea on what our pace will be.
The movie and hotel are just for a change of pace, and I know he'll enjoy both as much as he'll enjoy the outdoor stuff.