It seems that as a matter of convenience, most/all of the bags that are available are quick-release, with the "snaps" (or whatever they're called) very close to the bottom of the bag, so they'd be easily visible/reachable. Do any of you know of a bag that either doesn't have the quick-release snaps, or has them in the middle of the straps, so they'd be on the underside of the seat? Or am I kidding myself, and this is a just plain bad idea?
Why do I want this? Because I wear a high-viz, armoured jacket when I ride, but when I'm running errands or going somewhere to spend time (dinner, shopping, etc.), I'd like to not have to wear or carry the jacket with me. It's heavy, not to mention obnoxious to look at.

This seat bag seems to be the perfect shape, and with new/different straps, could be easily modified to be what I'm describing (though it might not be big enough):
http://www.revzilla.com/motorcycle/wolf ... k-tail-bag
And I just ordered this roll bag to see if it might work with or without modifying, but it hasn't arrived yet:
http://www.revzilla.com/motorcycle/sadd ... e-roll-bag
Would love to know your thoughts/experiences! Thank you.