Thanks ABtraveller, on that information we will most likely stop overnight in Kingston.
Overnighting in Kingston sounds like a good idea. Just a suggestion for the next day, instead of getting right back on the main highway (Hway 401) take the first part of your journey via Hway 33 aka the Loyalist Parkway. It is a much more pleasant drive and will let you see a very interesting slice of old Ontario. See: http://www.loyalistparkway.org/
Thanks very much CanProf for that information, we will certainly take onboard your advice.