Review:

We were able to only get one night in the Colter Bay RV Park, as it books up immediately when dates are released. We kept trying and finally got one night after someone cancelled. 

The campground is between Colter Bay Village and the Colter Bay Campground (no hookups). The check-in process was efficient and smooth, and Site #480 (on the end) was quite level on gravel with full hookups and a number of trees. It was a very good site, though as we rode around, most of the sites looked solid.

There are trails to the store and the lake from the RV Park, and sites were well-spaced out. We would definitely stay here again if camping in the northern part of Grand Teton National Park.