What fun! It's so great to see kids getting into kayaking.
If and when you decide to head north, my brother Nick and sister in law live just North of Saratoga Springs, just a few minutes off the Northway. They rent out a genuine Mongolian yurt in their back yard on Air BnB, plenty of room for the whole family (has AC and heat) and has an outdoor shower as well as access to full bathroom in the house (plus a koi pond with waterfall and Japanese bridge and a couple of friendly resident kitties). They often kayak in the area themselves and can direct you to some great paddles nearby including Fish Creek (which passes an excellent brick oven pizza restaurant, Hearth and Harvest, with its own dock), the upper Hudson River and Lake George. It would be a good base camp for further trips into the lakes and rivers of the Dack's.
https://www.airbnb.com/rooms/23272095