Mikesell-Potts Recreation Area

Exit 51 off I-90. Big rig friendly, Elec (8 sites) $15: large private, shaded, firepit/table, back-in, some require a bit of leveling. 1st come only, may get crowded on weekends or during rodeo week.

Primitive (30+ sites) lake side $10: some shaded tables,some pull-thru.

Primitive (30+ sites) $10: large private shaded, Barkey Draw, no lake view.

Vault restrooms only, no potable water no dump (water & dump may be available for a fee at the Lake Stop store - same exit), friendly conscientious hosts. Day use Swim beach & picnic area (free) on S end. Both boat ramps (free) are in quiet bays & good for paddling (kayak, boarding), good fishing (100+ft deep) but lake can get REAL rough real quick with storms coming from West over the Big Horn Mountains. It's an excellent base-camp to explore North Central WY in day-loops (Big Horn Mountains, Devils Tower-2hrs, Shell Falls, or Tensleep canyon). I have pics, and more info as it is my home area. bwiled.2 at gmail dotcom. All who wander are NOT lost..

http://www.johnsoncountywyoming.org/departments/mikesell-potts-recreation-area/

We stayed here after we got to another campground that did not have cell service. I wish we had known sooner! This place is beautiful with 8 electrical sites and over 100 other sites, many lake front. We stayed 2 nights at an electrical site for $15 and then moved to a lake side dry camping site for $10/night. We needed to refill out fresh water and called up to Lake Stop RV up the road, they told us we could fill at any site that was not occupied. When we offered to pay they told us it wasn't necessary.
There are two entrances to the park, in my opinion the better Lake spots are in the second entrance about 1/4 mile up the road from the first. Plenty to do at the lake, boating, Kayaking, hiking and walking trails. There is a day use Swim area as well.
We stayed in a 42ft 5th Wheel.