Put her in 4 high and try it. I use 4 high where we boondock and it's sand roads. Some of the roads in are under water and mucky sometimes and 4 high does the trick. Your truck will surprise you. When I'm loaded going in there the total weight is just over 25,000 lbs, truck and 5er.You might have to put your foot into it a bit once you start climbing but you'll know when you'll have to do that. Oh yes, don't forget to take it out of 4 wheel drive when you're out of there and back on the highway. The truck makes a different sound at 60/65 mph.