We have never done the Disney Adventures trip, but since we go to Jackson, WY, each summer, thought I might help. We have been rafting many times, usually on the Snake River. You will have a blast. Keep a look-out for bald eagles (we've seen over 20 on the dinner rafting trip). The temperature depends on what time of the summer you are rafting, be prepared for cold. You are rafting in mountain run-off. We were there the beginning of July last year and it was cold. They did supply wet suits if you wanted them. The good thing about the earlier summer is the water level of the river is higher, so the rapids are better. It is not so cold that you will regret going, that's for sure. You are in for a treat. We have traveled extensively, and this area is really one that will warm your heart. Let me know if you have any more questions.