[jambo]

My toolkit for bike looks something like this:
8,10,12,14,17mm Spanners / socket
Puncture repair kit
Screwdrivers (Ph #2, PH#3 & Flat head)
Spare Brake & clutch levers if possible
Gaffa/Duct tape & cable ties
4,5,6mm allen keys
Pliers / Mole grips
Latex gloves (You always have a problem with the dirtiest part of the bike)

That aside:
Side-stand puck (Though I believe Messie's bringing a few spares)
Tent
Sleeping Bag
Torch (with extra batteries)
Wallet
Phone that'll last the whole weekend / some method of charging in a field, there will NOT be 200 wall sockets...
Deoderant
T-shirts, socks & underwear
Chain lube
Camera

That should pretty much sort it
Jambo