We live in Kingston Ontario and have camped in several of the Parks of the St. Lawrence, but not the one near the bird sanctuary. Just a few miles down the road is Riverside-Cedar which is also adjascent to Upper Canada Village. It's a historic village set in the 1860's where you and your children can see a farm that produces milk and grain. The milk goes to the nearby dairy where you can watch it churned into butter. The grain goes to the water powered grist mill where it's ground into flour. The baker transforms that into bread which you can enjoy in the cafe. In the newspaper office you can watch as they set type on a 200 year old printing press, there's a tinsmith, a man making corn brooms. and so much more. It's a great place to spend a day. We've stayed in Riverside-Cedar several times while visiting the historical village. It's clean, safe and comfortable.
Our favourite campground in the area is McLaren Campground on The Long Sault. The Long Sault is a chain of islands, about 10 miles long, in the St. Lawrence River. Almost every campsite at McLaren gives you a view of the river. You can sit beside your camper and watch oceangoing freighters pass between the Canadian shore and Croll Island which is about 1,500 feet away on the US side of the border. The entire stretch of the Long Sault is Provincial Park with hiking and cycling trails.
Hope that helps!
Gary Cruise