i had good luck boondocking around Silverton at Mineral Creek and Maggie Gulch, National Forest and BLM places maybe 5 miles from town:
http://www.flickr.com/photos/81571751@N00/5826602714/in/set-72157626946925108
... and also way up the Gunnison at Taylor Park Reservoir, where there are actually electrical hookups at a National Forest campground that's not too crowded.
http://www.flickr.com/photos/81571751@N00/5912998541/in/set-72157627141432906