Yep - agree as Lk Champlain is a great destination.
It is alo possible to do a different mini loop of Hudson to Waterford, Erie to 3 Rivers, Oswego canal to Lk Ontario - take in some of the 1,000 Is then Rideau Canal from Kingston Ont to Ottawa. Ottawa Riv to St Lawrence & Montreal then E to the Chambley Canal to Lk Champlain, Champlain canal back to Hudson at Waterford.
The only duplication is the Hudson between NYC & Albany and plenty of ways to make different stop when headed N & then S.
The above has some very picturesque scenery, towns etc etc
Lots of detail info available if you have the time and inclination to consider this.