Vans are awesome tow vehicles. If I didn't end up with the F-350, I would have bought a van for towing the Jeep. Perfect for camping out of while bringing the Jeep to different parks.
January of last year a few friends and I piled in a friend's 4.8 2500 van and went down to NC to tow a pickup back. It has the right gearing, that's for sure. It had no problem pulling the hills in NC, TN, VA and PA with the pickup on it.
It was a 12 passenger van. Made switching drivers (stopped of course) and napping real easy. Lots of room to move around and eat and stuff. And stand up and stretch.