I like small, light and fast.
I think that the vehicle you choose will ultimately be determined by the equipment and personal items you feel are necessary to take. I also like wheel's ideas on pre-marking equipment.
I'd opt for the Tahoe. Easier to maneuver, can go off-road and less visible as a target. It can double as an RV with very few additional camping related items. And, if you have to beat it quickly, the Tahoe will leave the RV in the dirt.
I'd also take a couple of bicycles and a folding bicycle trailer as back up transportation. A hitch mounted cargo hauler and roof rack for additional storage would also be on my list.
Oh, and some nice camo netting to cover it all up if I have to stop overnight.