We stayed in Cody the day before we went to Yellowstone. Long drive from Cody & I don't recommend the KOA although Cody is an interesting town. There was what looked like a nice RV park in town but I can't recall the name. We stayed in W. Yellowstone at Grizzly RV park which was very nice & hits the top of preferred list. The town is small & everything is within walking distance from the RV park.
2011 Itasca Suncruiser, Jeep Grand Cherokee toad
MSgt retired USAF 1988, AA retired 2005