All campgrounds are now by reservation only via Recreation.gov. As of July 2020, Doris Campground is only open to RVs, travel trailers, and pop-ups with their own self-contained bathrooms. Tents and vehicles without a bathroom are not allowed at this time. Additionally, bathrooms and the shower house remain closed in the campground.
Super simple to make a last minute reservation and check in quickly. No hookups at my $24 site. Pricey for dry camping IMO but felt safe, which is a priority for me. Fire rings and bathrooms/dumpsters. Saw some HUGE longhorns and bison on the open range and that was great. No service whatsoever Verizon or T-Mobile.. do not recommend if you have remote workdays!