We tent camped at Bridge Bay for 2 nights and it was perfect! Staff was so friendly and helpful. We had a site in the back I loop, so we were away from the main section. It was quiet and away from people! Bathrooms were nice and cleaned often! Just watch for bison and elk!! LOL they love to wander around ;-)
As for showers / laundry - you can go to Fishing Bridge RV park down the road. It takes 4 minutes to get there. The facilities were great! Plenty of space to do laundry; have quarters! The showers were great. I had kids with me, so I was able to pay for one person and bring my small kids with me into the family stall. The shower stall had a baby changing station and a toilet as well as a bench area near the shower. The shower head was adjustable, so I could lower it for my 4 year old and he didn’t get water in his eyes as much! The park also has a general store and a car repair shop, so if you need anything it’s convenient to grab what you need!!