I've been debating for awhile on the same issue. There is a thread I started that has a lot of response on backpack ideas:
http://www.yamahastarstryker.com/index.php/topic,2489.msg50828.html#msg50828
Just today we stopped at a local bike dealer. It looks like you can get a lot bigger bag that goes over a sissy bar, but I don't have a sissy bar either. I may look into a quick release sissy bar and a large travel bag. But like you, right now it is only something that we may use a few times a year.
http://www.yamahastarstryker.com/index.php/topic,2489.msg50828.html#msg50828
Just today we stopped at a local bike dealer. It looks like you can get a lot bigger bag that goes over a sissy bar, but I don't have a sissy bar either. I may look into a quick release sissy bar and a large travel bag. But like you, right now it is only something that we may use a few times a year.
