Thanks guys. I think I might combine all the ideas, use a box for the soils and tie them up as well, and put some bubble wrap in there. The vehicle luckily is very new and has absolutely nothing wrong (but Ill double check before I leave, ya never know).

So that leaves me with what to do with the DWC setups. They are 18 gallon DWC (the Rubbermaid Roughneck kind). They are both pretty sealed up but I can ductape em around the edge to make sure. the 2 site DWC has been LSTed so its very secure. However the 4 site DWC has not been LSTed and the Alaskan Thunderfuck is a couple feet wide and its a little stretched. So I think I will incorporate some twine and maybe some coat hangers in the hydroton to keep those guys settled.

But do I leave them full of water? Half full? I actually could hook one an air pump for the ride and power a few airstones. Hmmm, I am going to assume that is the best action, but the water will be sloshing around a ton.