Be aware that there are two seasons in Yellowstone....winter and the 4th of July. We were in Yellowstone in the first part of June and it snowed each night. Not too deep but still is was cold. Places to visit..... Jackson Hole just south the Yellowstone and if you are coming through the eastern entrance then it is a must to stop at the Buffalo Bill Cody Museum in Cody, WY. Take two days to tour the museum, world class and we have been to some of the best. Jackson Hole has to be seen to believed, the mountains jump of the ground.
Have a great trip and if possible take more that two weeks.
Jim and Sharon
Jayco 2011 Greyhawk SS31