Found this park through Good Sams, made last minute reservation for an overnight. Nestled at the southern end of Swan Valley in the little town of Irwin, you will find this small campground. You check in at Chevron station and store. It is located close to Hwy 26, but we didn't hear any highway noise. Gravel sites, mostly level, some pull throughs toward the back. Didn't see any big rigs, but our overall length was 38' with our toad and we had six feet to spare. The views were nice with mountains on two sides and very convenient to the reservoir. Grand Teton NP is approx. 45min-1 hour away. Minimal amenities, 10 full hookup sites, water and 50 amp power were fine. Staff was friendly, but gas station gets busy. Would have liked to have stayed longer. Approx. $28-30 per night.
6/23/16 I called. Park sold. Now called Bucks. Seemed very friendly.
This is a very basic RV Park. The restrooms ate two port a potties. There are showers, but you have to get a key from the office before it closes between 7 and 8 pm. No Military discount as advertised. Okay for an overnight stop, but I would not stay long.