Intresting photo op idea. The Valles Caldera preserve is having a a lottery for photo access to most of the area. $10 entry fee, and if you win, you can drive almost anywhere.
From the application page: "Be among the first of the general public to explore spring on the Preserve and take photos. During this 3 day photo adventure, June 1-3, 2011(
other date range is September 27-29, 2011,), you can pick where you want to go, drive your own car, and take as many photos as you like. Yes, there will be some areas that will be off limits, but the bulk of the Preserve will be open for you to explore. High mountain meadows, large valleys, streams, forest, wildlife, cattle, cowboys, and old buildings are just a few of the things to be the subject of your photos. Camping in a designated primitive campsite is allowed with this event. "
Valles Caldera National Preserve