Sno Bored is right! There's never any reason to pay for camping in Colorado (unless you really want to camp near roads with strangers
). Pick up the Colorado Atlas & Gazetteer by DeLorme. It gives detailed topo maps of the entire state. I would not use these maps for proper orienteering, but they provide excellent information on the lay of the land, access to public land, etc. Using these books I have found amazing places throughout Colorado. My wife & I also found areas just outside the Grand Canyon National Park's North Rim, where we were able to primitive camp (for free of course), without another soul near by.
Good luck and feel free to PM me for some of my favorite spots in the Aspen/Glenwood/Crested Butte areas. Happy camping!
