Bridge Bay is a monster of a campground- over 400 sites! That is more people than my neighborhood has!  Honestly I can't believe we picked to stay here, as it is not our typical style, but it was all about location and convenience for this stay. The campground sits on the shores of Yellowstone Lake and is conveniently located for seeing many of the attractions of the park. Not much in terms of privacy but the sites are clean and level and the campground offers wildlife viewing right from your site!  It is a reservation campground but we lucked out and got a site for 2 nights by just pulling in on a Thursday.