To carry my 32 gallon sewer tote I designed and installed a system to carry the tote between the rear frame rails, yet be on a ramp I can lower to easily access the tote and replace it under the unit for travel. It lowers with a winch I operate with my cordless drill, the access is in my rearmost compartment.
The ramp itself is constructed of aluminum channel and aluminum angle. When raised there are hitch pin locks on each side to prevent inadvertent lowering should the winch have a problem.