We just got back from Colorado and not only were dispersed camping areas like in the Kaibab National Forest, Arizonia fairly empty---- there were a few campers, but none closer than a couple of miles.
Some organized campgrounds like this one near Fairplay, Colorado, we completely empty---had it all to ourselves. Heater, definitely required.
Miss the backpacking days, so finding solitude is wonderful.
Thanks for the tip on Little Sandy
Diane