I was born and raised near the Falls and know pretty much every back road and trail in the Niagara Peninsula.I can get you to Huntsville with a minimum of slab but I need to think about it a bit. The route I'm thinking about eliminates the 401.
There will be some boring bits that are unavoidable in South-West Ontario but at least you won't get ran over by a Quebec trucker hopped up on bennies on the 401.
That would be awesome Bill. I was wondering when you were going to chime in!
If you have the time to do it this route will first take you over to Victoria Park for the best view of the Horseshoe Falls (the Canadian and best part of Niagara Falls) and then runs down the Niagara Parkway to Niagara-on-the-Lake which IMHO is worth at least a quick stop if you have never been in the area. Lots of history and a somewhat trendy but nice main street to take a stroll and have some good ice cream. From there I route you along the shoreline of Lake Ontario for a short bit and then its through the vineyards and fruit orchards over to Thorold and use the Thorold Tunnel to go under the Welland Canal before heading over to Decew Falls.
I then run you through more vineyards past the well respected Henry of Pelham winery over to Balls Falls and then turn you along the brink of the Niagara escarpment over to Hamilton. From here it gets boring until you hit the Forks of the Credit which will wake you back up. I then take you over to top of Toronto just skirting the top of Newmarket before taking you up Hwy 12 just before Orillia.
I then will get you onto Mounk Rd over to Norland that has some nice sweepers before turning north on Hwy 35 all the way up to Hwy 60 and then turn you off for the final section to the resort. The route measures out to 541 km and other than the short section at Hamilton this route has no 4 lane slab.
Here is the link to the Garmin gdb file:
Niagara Falls to Huntsville