I have Jumbo Slant Drifters permanently attached, tall sissybar with rack, and just last week picked up a tankbag. A (flight) helmet bag on the rack and both side bags full worked for a weeks worth of crap. But forget all that... If you can get past the first impression, for weekends and day trips, consider a tank bag. They are sized from small to carry little things up to very large to carry tons of stuff, the strapped ones are almost as fast on-and-off as the magnetics, making it easy to grab off the bike, and a strap-on (stop that giggling) won't fly off at speed. If you use one for a couple of days, it'll become indispensable. You can always leave it at home when you're not travelling, but if you start using one, you won't want to leave home without it.