Yellowstone and area suggestions..

Where you stay is not really important in Yellowstone. It is a very big place and nothing is close to everything. Also, you won't be at your campsite very much, Yellowstone means long days out and about. Yellowstone is also not very bicycle friendly. You have to decide what you need in a campground and search for those amenities. Only Fishing Bridge has hookups inside the park. Several other campgrounds do not have showers which might be an issue managing 6 people's grooming schedules and those that do charge a fee. Six people can use a lot of water and fill waste tanks quickly, so you might be better served staying in a full service park. West Yellowstone and Gardiner are the best located towns for staying outside the park. Parks there will get you access to shopping, dining, cellular service, cable television and wifi. Make reservations ASAP since you can expect parks to be sold out daily during your timeframe.