Those are some serious stucks. Don't know if you tried it or not, but if you use a ****** block you can half the weight of the pull to save the winch motor some grief. If you had gotten through a hole and the guy behind you gets stuck, put your tree strap around a tree in front (and to the side) of you and attach a ****** block pulley to it. Run your winches cable through the pulley and back to the quad. The other method is if you're facing the quad that's stuck, run the ****** block to the stuck quad and the hook back to your quad. I've had to do this in waist deep snow to pull out a Polaris Sporstman X2, which is about the heaviest quad out there. You could hear the difference in the strain on the motor.