Your tackle selection would be "bare minimum".  Less is not more when your in canoe country for an extended period of time IMO.  Did you happen across the   (You need to Login or Register on the site?  There have also been many discussions in the past on what fishing gear to bring and what others recommend.  23 days?  <Napolean>Lucky</napolean>.  I would have at least 2 rods and a rod repair kit with extra guides, line, spools etc...

I would expect mid August walleye between 30-35 feet during the day but up into the 20-30 range later in the afternoon/eve.

This is just my brief opinion however.  You won't have any problems catching fish in August on the lakes along your route.