Trent, you have your pick in Westborough, outfitter alley
Trailhead....had a neat policy that you could pick up after 12 on Friday, return before noon monday and it was a two day rental
Paddleshack:
http://www.paddleshack.ca/ottawa/rentals/MEC also does rentals
I'm sure I'm forgetting some
on the Quebec side Cape de Base:
http://www.campdebase.ca/if this is a long weekend trip, I would advise reserving in advance. There are quite a few paddlers in Ottawa that do whitewater and many use the rental service for tripping boats.
Cheers
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