Trip to Saratoga Springs New York

Chuck and I plan to take our first extended trip (we are in Wisconsin) with our new 560 to visit his sister and her family in Saratoga Springs NY during July. We are considering going into Canada for at least one way. Is there a campground resource for Canada that is helpful? We realize this is the middle of the summer crunch but because of family schedules this is the time we have. Is it reasonable to hope we will be able to find campground space during this time? Thanks!