I did just what you mentioned to my bags last year. I bought some nylon straps in the camping section at Walmart for a couple bucks a piece. Then I used leather rivets to add them to my bags. I needed to add a D-ring to each strap to keep them from blowing around in the wind. It makes it a little easier to get into the bags. Mine are Willie & Max Black Magic bags. I think most of the manufacturers come with the quick release buckles now and that's where I got the idea. Harley Bags have been using them too.