So, here's my solution: I store it against the ceiling of my garage. This method has a number of advantages; it keeps it out of harms way, doesn't risk it when moving it to/from someplace since its stored directly above the car, and can be *easily* removed and installed by one person.
Cost for the setup was about $300; $70 for an electric hoist from Harbor Freight, the rest of the cost for stranded wire cable, four pullies, turnbuckles for fine adjustment of cable length, aluminum stock, electrical cable to move the control unit, etc. Someone evidently without a good grasp of the term called it "Rube Goldberg", but its actually very simple and effective: