My unpaved mountain road doesn't get plowed in winter, but my ridge is a popular 4WD destination, so I often have to travel with a foot or more of chopped up refrozen slush. Would have to say I've done better in my Cherokee with 30 X 9.50 BFG Mud Terrains than anything else I've tried... vastly better than the BFG ATs I had on it before. Run them at 26 lbs. Road handling is better than expected, though a tad noisy. Chains are a real pain to install over the lugs, however.
Tire choice depends on local conditions, of course, but for most everything but loose sandy washes and competitive mud-bogging and rock-crawling, you're actually better off with a narrower tire due to higher contact pressure. Can't tell you how many times I've stopped to help some off-road newbie with fat tires stuck in the ditch on a snowy day...
FWIW--I don't expect to get more than about 20K out of a set of true off-road tires.
LionHo