We stayed in one of the St. Lawrence Seaway Parks (Ivy Lea I think) on our way back from Vermont this summer. It was clean and had water and electric service on site, clean close washrooms and showers and dumping facilities. We only stayed one night but it would be quite acceptable for short term stays as there are a lot of historical things to see and do in the nearby areas. Two things to remember are that, to Canadians, nearby may not be quite as close as you expect and the St Lawrence Seaway Parks are not provincial parks, so you may have to check for them under a different heading on the internet. It will probably be a few dollars more to camp here but you will only have to cross the border once and you will possibly enjoy a different perspective on the war of 1812 and eary life in (upper)Canada at Old Fort Henry and Upper Canada Village. Whatever you decide...enjoy you trip and feel free to return anytime.