Someone told my BIL that when he went to get his ORV permit last month that there is now a sign stating that all wheel drive vehicles will NOT be permitted due to the amount of stuck vehicles that have had to be towed this year. Does anyone know if this is true and/or official? My Suburban is, of course, 4 wheel drive so it doesn't really matter but I was just curious about this? The official NPS.gov page doesn't mention it and, in fact, the 7 minute video they force feed you actually states that 2 wheel drive vehicles are allowed but not reccomended...lol. So I'm not sure how they could enforce this "no all wheel vehicle" rule.