Pottsdam area recommendations

My wife and I will be staying up in the Potsdam area for several days soon. We both have Spitfire PB canoes. I'm looking for any suggestions on some day trips to explore some flat water areas. We enjoy beaver dams... and an up and back trip. Perhaps someone could suggest a trip or two? I'm aware of the Grass, and Raquette River and Massawepie Lake but are there some other gems up in that area? We'd be willing to drive an ~hour from Potsdam as well. I know that really opens options up for paddling but having someone give suggestions on specific trips helps narrow down the guesswork.

Thanks for the consideration.

Pic for attention.