Been to Yellowstone 3 times and going back this coming July via Jackson Hole and the Grand Tetons. Fishing Bridge campground is the only CG that has full hook ups and it must be a hard sided camper (bear country).
In Bozeman we stayed at the KOA which was very convenient and well kept. At Little Bighorn we stayed at the 7th Calvary Ranch. Nice but not a tree to be had. Could not be closer to the battlefield. Like others said Bad Lands, Mt Rushmore and Custer State Park are great sights to see.
G-Daddy I will let you know how it goes. We are heading to Florida with the rig for six weeks right after Christmas. Looking forward to that trip also. Good luck on your up coming retirement. You are going to love it.
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Tom & Terri
2012 GMC Yukon
2013 Roockwood Mini Lite 2109s
Went from Green Bay, Wi. to Yellowstone 2 summers back. Stayed at Henry's Lake State Park, Idaho. Great park, beautiful. Would be a hop, skip, and a jump from Bozeman. Didn't take the camper into Yellowstone. We only stayed 9 days, nice you have a month, lots to visit, lots to see. Enjoy!