Custom built trailer rigs with built storage units containing outdoor cooking systems, water filtration and cisterns as well as complete survival gear packd in are worth more than just overland adventure and camping trip convenience. Trailer systems might be the most ideal and unobtrusive survival rig you can get for your vehicle to get it ready for a bug out situation. Survival trailer tubs have evolved from the seeming two-wheeled, wheelbarrow cab bed used by the U.S. Army to multi-compartment, modular storage systems that can house sleeping quarters, a fridge and even be equipped with solar panel racks.