I've only been towed one time, and just about anything, short of a 6x6 UNIMog, likely would have gotten stuck. Rut was only about 4-5" deep, but it was volcanic clay mud, so zero traction due to tire tread full of mud; like trying to drive on ice, it was so slick. Took 2 other 4x4s to get me out and tow straps long enough for them to get out onto a gravel road where they had traction. I likely could have gotten out by myself and left my trailer there for several days, but also likely, I'd've come back to find my trailer stripped. One of the downsides to boondocking in the AZ forest in the summer.
Lyle