Thanks you two!
John E, I need to do the wall as the garage door would get in the way.
tsl: nice set up! It's a lot like what I'm looking for, right down to the lock. I plan to sink some sort of eye bolt into the cement in the garage. I realize no lock is perfect, but I at least want to slow down the quick grab artist.
We thought about hanging every other one upside down, but we're both smallish, and we ride a lot. We don't want to wrestle with them at all, and putting them bars up at least seems like it would be easier.