We use several of the 4wd tractors in our farming operation as well as large rubber tracked tractors. The dozer is really not too bad to pull out of the mud unless it sinks down too far and becomes a dead weight. Years of experience has taught me that once I'm stuck, stop spinning and get a tow. As long as the tractor will move back and forth in the rut it doesn't take too much to give it a little boost to get the tracks to get some new traction and lift itself out.
What I see novice operators or duffless operators do is long after there is any chance of getting unstuck without help they just keep spinning it deeper. Once the mud is up to the top of the tracks and sitting on the belly pan and will not budge, then getting it out becomes a serious un-fun job. That goes for any type of tractor. Most very young farmers (I was probably ten at the time) get a severe butt chewing when the first time they get stuck they manage to continue spinning the tractor down and get it seriously stuck.
