That's what I figured. There's trails that I would be concerned about taking a Jeep with a RTT on, let along a high roof van. I'm assuming vehicles like Subarus should be held to 4 or under also?
Many of the routes are listed as passable with a 4x4 Sprinter. Given Sprinters don't have a 2 speed transfer case with low range, does that mean they're also passable with an AWD Transit?