If kn1ghtus wants to camp in the places I do, and it sounds like he does, he will just be getting close to the general camping area at 9,000 feet!
I have a 5.7L in my wife's Grand Cherokee, and heading up to Cripple Creek I had to downshift two gears in some spots, just to stay close to 55 mph. In my mind, I would not like to do that frequently. That's why I got my diesel Grand Cherokee. Much better at pulling the grades. I'm with tgpmd1 - get the most TV you can afford. It will last longer. I keep my vehicles to at least 250,000 miles, so I want it to be able to go where I want to go, without complaining about it.