my buddy and i were out riding last year and saw a sled stuck in the trees. we went over to lend a hand and out of the four guys in that group (only one sled was stuck, on flat ground around a tree) they were all yelling about getting a winch out. my buddy and i promptly stopped them, told them to just get out of the way, and we pulled the sled around.
my point being, in most cases where you could actually use a winch, you wont "need" it. I can think back to some good stucks ive had and i dont recall being in a situation where i couldve really used a winch to my advantage. I think the winch would be useful back at the trailer, but no more useful than a comealong.
EDIT: let me clarify, the winch would not be advantageous due to how i am usually stuck. Its usually in tight trees or steep hills, both of which would make it difficult to use a winch to my advantage.