Obviously, Yellowstone/Grand Teton parks are the big draws and to do it right, you have to spend a minimum of one week there (not including getting there and back from where you hail). I have been there four times; twice on MC trips and twice on RV trips. And if you camp in one of the many areas within those parks, I will advocate that you enjoy at least one mean in one of the several grand hotels in YNP. They do put on quite a nice dinner meal. It's a nice break from campfires to have an elegant and well prepared meal at least once on a trip.
But I'm going to advocate for some other places as well ...
Devil's Tower area. Admittedly it's sort of a one-horse town, meaning there's not much around but that singular attraction in the NE corner. But it's neat to see at least once, and there are some nice camping places around. Additionally, the trip around WY24 is very scenic in an "old west" sort of way; lots of open country and rolling hills, etc.
Town of Doubois on US26: Typically you're just passing through into or out of Jackson Hole (Tetons). But there are a few nice campgrounds there and in particular, the KOA along the Wind River. We got a site near the back and it bordered the river itself; it runs fast and clear. You'd better like the sound of rushing water and have decent continence ... hahaha. The scenery is wonderful.
Town of Thermopolis and the State park thereof: the park is a nice attraction if you're staying in this area. Not a lot of choices for RV parks, but there is at least one decent one (Eagle RV park).
Honestly, depending upon what you want to do, there are lots of great hiking, biking, ORV areas all around the state. It's not that hard to find a good campground in or near one of your desired attractions.
But I'm going to advocate for some other places as well ...
Devil's Tower area. Admittedly it's sort of a one-horse town, meaning there's not much around but that singular attraction in the NE corner. But it's neat to see at least once, and there are some nice camping places around. Additionally, the trip around WY24 is very scenic in an "old west" sort of way; lots of open country and rolling hills, etc.
Town of Doubois on US26: Typically you're just passing through into or out of Jackson Hole (Tetons). But there are a few nice campgrounds there and in particular, the KOA along the Wind River. We got a site near the back and it bordered the river itself; it runs fast and clear. You'd better like the sound of rushing water and have decent continence ... hahaha. The scenery is wonderful.
Town of Thermopolis and the State park thereof: the park is a nice attraction if you're staying in this area. Not a lot of choices for RV parks, but there is at least one decent one (Eagle RV park).
Honestly, depending upon what you want to do, there are lots of great hiking, biking, ORV areas all around the state. It's not that hard to find a good campground in or near one of your desired attractions.