A "Cruising Guide" of sorts is our travel blog -- circe.travelmap.net -- but make sure you select the 2022 trip (upper left corner drop down).
There is a Down East Circle Facebook groups, which is helpful.
It is a LOT shorter, faster, and easier to do the Erie Canal, although it requires the
mast out. They are good at this at both Hop O Nose (South of Albany) and Oswego City Marina (Oswego, on Lake Ontario). About $500 up and down.
Canada publishes a graphic
current book, both online (free) and in print. The currents are wild.
https://waves-vagues.dfo-mpo.gc.ca/l...8-41051531.pdf
On most of the Saint Lawrence, you'll need to be self-reliant. Especially fighting upstream, you'll find full
service marinas to be scarce.
Diesel will be a big problem. We carry 95 gallons, so it wasn't a problem. But,
ports (such as you find) are mainly
commercial fishing ports.
Fuel is obtained by tanker truck (only) and it is illegal for them to sell red-dye (for
fishing boats) to pleasure
boats (unlike US). Sometimes they will -- often they won't. Especially motoring against a couple knots of current, factor range and
fuel stops into your planning.
Water is a non-problem. We carry 150 gallons (more than many, I know), but it was just not an issue. Every two-bit town or wharf still had water available.
Outside the big population centers,
English is a bit of problem. They are friendliy, but commuicadtionb is a challenge.
Canadian Sailing Directions are helpful:
https://charts.gc.ca/publications/sa...iques-eng.html
There is a guide, basically a "chamber of commerce guide to members" that we found invaluable
https://alliancenautique.com/initiatives/nautiguide/
Hope this helps some.