On my last trip, i took one of these (although i was not aware they were called this!) and thought it was great."Messenger bags" - a somewhat flat bag with the kind of adjustable strap that you can put across your body, seem to be the cool thing now. I have one and the bonus to these is that they are usually larger than a fanny pack and can hold more, the drawback is that they can be bulky and get uncomfortable as the day goes on & I'm not sure if they'll let you take in on some rides.