LG, there is a thread in the Newcomers group about NC. I should think if you are in the east and footloose, then go down to the coast somewheres. You don't need elevation if you have the ocean breeze. Go now before the hurricanes come.
Pretty much everywhere seems to be hot. Last summer I hid out on the Oregon Coast, after the Cascades caught on fire. Then the coast caught fire and the fog was mixed with smoke. This year I'm in CO and it's hot. No, you really wouldn't want to be in WNC in August. 90+ with near 100% humidity, no thanks. Good luck, if you find someplace cool let us all know [emoji41]
I would suggest Wisconsin - that's where I am, but everyone seems to be out west, so it's a long haul...
However there is no BLM land to speak of, so stealth camping is a must in towns, Walmart and Home Depot are also viable options.
Follow up, they recently held CampFest south of Leadville, and it was apparently quite nice. CamperVan Kevin has some videos from the fest, and also camping along the Arkansas River near Buena Vista. He's selling his Class-C and getting a 4WD truck with popup truck camper. There are some fires in CO, but they're small, not like in California. https://www.youtube.com/user/gotmildew/videos