If you can't find a place to off-road, you can always do a road rally. Get a bunch of Hummers together and caravan! Then stop somewheres good for lunch, lining up all the Hummers. Our dealer does that here every so often .. one road rally for every three off-road events. We wind through the mountains here .. H1's, 2's and 3's. We passed a Mini-Cooper caravan last time up in the Santa Monica Mountains .. it was funny seeing those ants followingone another .. even though they gave up the one finger salute as we passed.
Anyways, just get together and compare notes about your Hummers! Don't take forever deciding 'when and where'.