I have a Trek 6500 MTB. It came with a wheelset built on c201 hubs. The rear hub began to grind after about 1 year of moderate use, mostly as a commuting bike in fair weather. The shop worked on it, but it was never smooth again. The front hub was OK.
I then looked up the hub and it's from a comfort/recreation group sold by shimano.
Now maybe with better maintenance the hub would have held up, but after my experience I wouldn't rely on these hubs to hold up for touring.
I've had good luck with wheels built on Deore and LX hubs for commuting and loaded touring.