i spent the last week camping out, pulling all my stuff on a bob-yak.. i also have a rear rack that's pretty packed out too, but i can stay out for 4+ days without hitting a grocery store with that. a bob is also good for standup pump. one wish a pressure gauge and such.. those little ones are okay for road usage but when you're hauling a big weight, having the ability to get your tires to pressure is nice.. panniers and a rack might be tricky to carry it on.
as winter comes along it'll get colder and colder.. i'm considering getting panniers in addition to my bob, but again, i am thinking of a longer term than weekend trip.
another nice part of a bob, if you do any mountainbiking, unhook and zoom! (i know you mentioned roadbike.)
does anyone know if the roadbike fork for the bob has a differentweight limit than the mountainbike one? (70 lbs)