I use a back pack because it is what I have and it fits what I want to carry. I am looking for a set of panniers and or a trunk. I put a rear rack on my bike so I could do this but just haven't had the disposable income to buy it yet...and I am not sure of what I want yet. I need fenders still too and I think they will be first. I have been looking at this cannondale pack. Anyone using it?