I probably would have been caught off guard with that sun. SPF 70 should be good for anything, but they probably don't come back to put more on often enough. Too busy. Try to find some zinc. That pasty white looking stuff. No sun gets through that. Not over blisters though.
Anyway, sounds like fun otherwise. Some of the surgeons and nurses I know go to Dominican Republican fairly often to do heart surgeries on the kids. So, I've heard about it before. The crazy driving, etc. Sounds like Boston.
Love you all so much. Miss you, but glad you are having a good time!