[thenewkid64]

We stayed in Yellowstone NP in 1995 and loved it. There are a few campsites, all have 3 way hook ups. They are all medium sized so you are not looking at the feild or RV's you mention. My suggestion is to try to get into the one that is centrally located so you do not spend all day driving from spot to spot. The park is huge. You will not see pop ups or any kind of "soft sided" campers as you are in the middle of bear country. Take a range of clothing as in the upper elevations there is still snow on the ground in July.

Have fun.