i always liked the idea of having a hitch mounted wench.that way you could have 1 winch pullin double duty when you needed it.just have to figure out some kind of quick connect terminals connections at both ends of the rig.
Sounds good in theory, but I wonder how awesome it would be in real life...
Receiver mounted winches stick WAY out in front (or back) so odds are that you aren't going to have it connected on a tough rocky trail. It's going to ruin your approach angle. Then, you get stuck on a really steep and rocky section...maybe even get a little tipped to one side. Time to climb into the back of the truck to get the winch and carry that bulky 100+Lbs up a bunch of rocks without killing yourself or dropping the winch in the process.
Hopefully the front reciever hitch isn't too close to a rock or other obstacle or you won't be able to slide the receiver in place to get it locked down.
If all goes well, you're in business..... but it sure seems like a LOT of hassle. PLUS, and this is a BIG issue... do you really want a 100Lb winch rolling around in the back of the truck while you're on the trail. What if you roll or flop? That wrecking ball is going to kill someone and/or do a massive amount of damage to everything it hits.
I used to be really convinced that a removable winch was the bees-knees, but as I've thought about it more and more, the less I think it's the right way to go. A hidden front winch saves you from excessive overhang and will get you out of most problems. If you really need a rear pull, there's probably a way to rig it with some tree savers and a snatch block or two... plus, nobody wheels alone right

so someone else could always throw a strap on ya and give you a tug backwards if needed.
