I camp on outer beaches of the ocean in sand a lot. Knowing where we have to go to get to our site I air down the truck to 13 pounds in the front 15 pounds in the rear and 20 pounds on the trailer. That way the fronts flatten out the sand more for the next set and the next set. This is ocean sand nice and soft which might be different where your going. If stuck, stop gassing it and digging down as it will always take you longer to get out. The worst that ever happened to me was coming over the dunes and many before me did not air down and rototilled the "ramp". What that does is add lots of air so I drove down the ramp and sunk. Thanks guys! Disconnected, jack up truck fill in hole on all fours. Same on the Trailer. Then create a pathway with a shovel so that the tires would be free from sand mounds for at least a truck length. You need some forward momentum, and made it out. Don't be misled, just because you put big wide tires on, they still need to be aired down.