Our winter forecast this weekend includes a high primarily of ice. I remember as a kid that my dad would put a couple of bags of cement mix in the bed of his 2wd pickup, stating that the additional weight helped with traction given that the weight on the rear axle was much lighter. Is this helpful with a current 4wd Ram 1500 with all season tires? This is my first pickup but have had no issues in just snow, and have a lot of winter experience in AWD cars and SUV's. Thanks!