I need new tires (275-65R18) on my 2008 Toyota Tundra Crewmax. I'm stuck between the Michelin LTX M/S2 and the LTX A/T2. I live in Milwaukee but spend every other weekend in the northwoods of Wisconsin and make one or two trips a year into the U.P. I pull a 4 place enclosed trailer a couple times a year. I want a tire that I will get some life out of but want an aggresive tire in the snow. Any Thoughts???