Big Diesel with Heavy Modern TC - But Where Can U Drive?

Our TC isn't particularly heavy, but we haven't found a forest road we couldn't handle fairly easily. The main issue is the width with our dually, but rocks and steep roads haven't been an issue. You can essentially go where ever you want. The truck is stock; no modifications. We get around 12 mpg at 70 mph, and probably 13 to 14 if we slow down. I don't pay that much attention to mileage. We just go out and gave a good time.