Where are the Swift guys located?
Good question, been a while since I've been. Since there are only two roads approaching the park, one of them. I would just google the web site and click to a map. They are on on the busiest ingress, for sure, because they put a lot of people in the park. Swift has a few other locations, also.
Don't know how you're getting there, but a side trip to Peterborough would be nice. They have the Canadian Canoe Museum, and also the lift locks.