This would be good to tow behind your bus ;D Would'nt get much in it but its different http://www.ebay.co.uk/itm/TRAILER-BOX-TRAILER-ADVERTISING-TRAILER-CATERING-TRAILER-CAR-CAMPING-TRAILER-/251048578445?pt=UK_Car_Accessories_Touring_Travel&hash=item3a73a94d8d
When i first saw that, i thought "cool! a beer barrel i could tow behind my bus, ive a tow bar...mmm Bishop's Finger..." I then read on and discovered to my horror that it has a lid! Its only a trailer! Now I feel cheated and a little melodramatic.
I just saw a honda goldwing trike pulling a beer keg shaped trailer behind it. Wasn't quick enough with my camera to take a piccy though.