On my trip a few weeks ago, had a little wrangler pull me out of a boggy bit. He bumped me a little bit, but nothing ridiculous. However, after he got me out, we looked at his back bumper and it was nearly ripped off. His response was, oh yeh, last time that happened, I just bent it back... He did not pull me out of anything else that trip.
Beware of Jeep bumpers. I had assumed that a hitch mount D-link would be fine, but I forget that not everyone has their hitch attached to the frame to be good for 120,000 lbs.