Does anyone have any recommendations for a rucksack that can be used on a bike to haul around camping gear for a week or two? I estimate I need around 45L of capacity (40 if it can be used with a camelbak).

Looking for something that I can through my gear into, jump on a plane, rent a bike upon arrival in foreign lands, do a spot of motorcycle exploring/camping for the duration of my stay, return the bike and then fly back home. Because it's a rented bike I can't guarantee being able to strap luggage to it, hence the rucksack idea.

I know Kreiga stuff is good, but the largest they do is a 35L, and I'm not sure how secure strapping a US10 to it would be for when the whole kit has to cope with airline check in, wouldn't want just half my gear to arrive thanks to the sack and US10 getting seperated.

Thanks

Steve