Here are a few things I would bring in addition to what people have already said:
I'm guessing they're using external bearing cranks, so I'd bring a spare set of bearings and the tools and know how to change them. I don't think it's any more difficult than normal BB but you might need some special tools.
If you think you'll be building a wheel then a nipple driver (screwdriver with a nub in the middle) makes the first stage much quicker and more accurate.
A headset expander wedge (instead of a star fangled but) might be useful if they have carbon forks and the expander stops working.
Spare derailleur hangers if they have replaceable ones.
Nice one Nhatt - this should be lots of fun.
Here are a few things I would bring in addition to what people have already said:
I'm guessing they're using external bearing cranks, so I'd bring a spare set of bearings and the tools and know how to change them. I don't think it's any more difficult than normal BB but you might need some special tools.
If you think you'll be building a wheel then a nipple driver (screwdriver with a nub in the middle) makes the first stage much quicker and more accurate.
A headset expander wedge (instead of a star fangled but) might be useful if they have carbon forks and the expander stops working.
Spare derailleur hangers if they have replaceable ones.
A big dose of patience and sense of humour!