Re: DUNLOP TIRES
I'm partial toward Goodyear, myself. BFGoodrich is good, also. Don't know much about Dunlop.
MTs aren't good for ice, which we see alot of. ATs are better. RT, by the way, stands for "Road Terrain". Good for road use, sucks off-road. (See "worthless factory tires")
A good compromise would be an "all season" tire like the Goodyear Workhorse. I had a set of 'em on a '76 Cherokee I sold, and I never got stuck in that truck. They powered thru everything. Good ice traction, too. (We use gravel here. Salt won't work.) Stick with "LT", or light truck, tires (ex: LT235/75R15, 33X12.5-15LT) for better traction, reliability, and handling!