I carry a couple 6" 2x4's along with my chains. If I can move the pickup at all, I lay out the chains and put a 2x4 between 2 of the cross links. Then I drive up on them. That little bit of height gives me a lot of extra room to adjust the chains to get them tighter. If I'm good and stuck, sometimes I can get the chains on any way possible and then drive up on the boards to tighten them properly. Luckily I haven't been that stuck in many years.
You ole trucker, you!
