I've done Pontcysyllte by narrowboat, but the first time I crossed it was with a 2-man canoe. As it was January, the canal was frozen over, so we had to carry it on our shoulders as we teetered along the icy towpath, between a 100ft drop and a trough of icy water.
The first time I crossed the aqueduct was in a 24ft x 3ft Thames punt, fitted with steel hoops and canvas for camping. We crossed both ways and I confess to using the paddle rather than the punting pole.
We had a glorious August week on the canal, from the Horseshoe Falls to Chirk and back, with great weather. It was our honeymoon - sharing a 3ft wide bed for a week is great preparation for 63 years of marriage!