If you are camping, there is a very nice camping area with shower facility at Holley. The lift bridge operator there will provide the lock combo. Campsites with tables, right on the bank, town a couple of hundred yards away. The bridge operator kindly showed me his control panel, which was cool. Holley also has bonus points if you're Italian!
There's some chatter among my riding buds for a trip on the Canal in Sept. although I don't think I'll be convincing these folks to camp.
Enjoy the heck out of your ride and be sure to post your experiences for those of us to follow.