What is some heavy crap some of you guys have put in your beds before in 2wd trucks to help get up a steep driveway? I've never had to get bags of sand and wouldn't know where to get something like this that's "safe" I have plenty of wood and cement bricks but.. Yeah doesn't seem the safest. Anything easy to go get for this? I made it out tonight but barely (thanks to the posi rear end) but I could feel it hopping and just needing more gravity. Honestly did pretty well for five inches of snow and the steepness of the driveway.