I had been planning on leaving the bag on the bike empty. I dont leave the bike out over night, she is an indoors bike. She is usually only left locked for a few hours at a time but I guess I should just take the bag in with me. I talked to RIV on the phone and they do not sell a "quick releas system" I think you are thinking of the cardice handlebar bags. I doubt too many people would both to cut the leather on the bottom of hte bag because that would make it almost useless unless that were just out to vadalize.

There just does not seem to be a big theft problem here in Korea so I think I am more willing to risk it. Or I am just being a nieve traveler. I did try to use a should strap with the bag but its not a very good pack back.