Yeah, get waterproof for sure. Just don't expect it to be perfectly waterproof (unless you drop £££s), and don't forget that you will have wet things (towels, clothes, etc.) which will be going in the bags.
Things that I would say were very useful:
Purell
Zip ties (to go with the zip lock bags)
Extra socks
Maybe useful?
Extra spokes and nipples (you can tape the spokes to the frame of the bike)
An extra map maybe? I wouldn't bring one to be honest, but I lost my map once and it sucked ass.
Yeah, get waterproof for sure. Just don't expect it to be perfectly waterproof (unless you drop £££s), and don't forget that you will have wet things (towels, clothes, etc.) which will be going in the bags.
Things that I would say were very useful:
Purell
Zip ties (to go with the zip lock bags)
Extra socks
Maybe useful?
Extra spokes and nipples (you can tape the spokes to the frame of the bike)
An extra map maybe? I wouldn't bring one to be honest, but I lost my map once and it sucked ass.
That's all I can really think of right now.