Hey Fridge,
Yeah I've done the Mayday run to Hastings a couple of times. I Hate It!!
15,000 bikes all getting in each others way, overheating in the innevitable queues that buil up in the too small country lanes and then struggeling for somewhere to park when you get there. If your gonna go, go real early in the morning before it gets too built up.
Great thing about it though - It attracts all the police for miles so me and my mates go in a different direction and have a real good rip up without seeing any plod all day :-D