Thanks everyone! With 4.5 feet I should be okay through the trent severn, and the water is higher this year than the past. I was mostly concerned about crossing ontario with the stick on deck.....If the lake erie route was only slghtly longer I might have gone that way. However, from everyone's opinions it seems that going through trent severn is faster, and just wait for the right day on lake ontario.
Our ultimate distnation is the Chesapeake, which we hope to reach by mid to late July.