On our way to Alaska, we stopped by Mt. Rushmore, Crazy Horse, Yellowstone and Grand Tetons. At Mt. Rushmore we stayed at Heartland RV Park for a few days since it's a Passport America campground. If you're not familiar with Passport America, you get a 50% discount although some of the campgrounds have restrictions on when they offer the discount. It was a little further from some places, but only $17.50/night. If you stay there try the little pizza place called Lintz Brothers that is close to there. They had the best pizza that we had eaten for awhile.
On a previous trip to Yellowstone about 7 years ago, we entered in through the West Entrance and stayed at Grizzly RV Park in West Yellowstone which was very nice, but a little expensive. Most private campgrounds around Yellowstone were ridiculous in what they charged. Our trip lasted 7 weeks and there were 4 adults and 2 dogs in our model 2350. Since most places charge extra for more than 2 adults, it was difficult to find anything cheaper than $60/night in that area. This trip, on our way home, we even had to pay extra for our dogs. It's bad enough that campgrounds charge extra for each adult over 2, but $5/night extra for having a pet is getting a little ridiculous.
At Yellowstone we entered through the east entrance and dry camped at Bridge Bay. Cost was $21.80/night. Then we dry camped at Lewis Lake Campground inside Yellowstone. Cost was $12/night. On our way to Grand Tetons we stayed at Flagg Ranch campground which is between Yellowstone and Grand Tetons. Convenient campground but we won't ever do that again. Cost was $74.20 for 1 night. The campground was just OK. They only had 15 amp electric which required an adapter. I have several of them and I couldn't find any of them in the RV. I guess I forgot and left them at home so I had to buy one at about 4 times the normal price at their store. With 4 adults in a model 2350, we used the campground showers more than the one in the RV since it has a very small grey water tank. The showers at Flagg Ranch were filthy, missing shower heads, etc. For what this place cost you would have expected more. Unless you have to, I wouldn't stay there.
One word of warning since we were towing a 2009 Cobalt. A lot of places to stop and see in Yellowstone have limited RV parking and some have no RV parking. It was very frustrating trying to find a place to park when cars parked in the RV parking places even though there were plenty of parking spaces in the correct area for their car. We had to miss seeing some things because of that. If we had it to do over, we would have left the RV at the campground and used the tow car for seeing most of Yellowstone.
The national parks in Utah have been on my list to visit for several years. Hopefully, we can make it there next year.
James & Jean