Was there this summer. Canadian rules say if you tow,you must pay for a locking pass for a towed dinghy. Been in the erie several times....never saw anyone towing in a lock.
I think davits are the wise choice. Then you don,t need to worry about where the dink is when the lock gets turbulent....and they do.
That said, my dinghy is just about as wide as the boat. I did scrape up the paint on the dink engine on 2 occasions when i didn,t allow for the extra space.
Next trip i will have a pad of some sort to protect the engine as well as the bow of the dink.