A few years ago, Hubby and I took his parents on a 15 day trip to Ontario. We went at the beginning of September, just after Ontario school started and right after high season ended. We didn't book any hotels/motels in advance and had no trouble finding reasonable accommodation. October will be more difficult since many folks will be out to see the Fall colours, so booking in advance would be a good idea. Highly recommended would be to stop off at a CAA office (
Canadian Automobile Association) and grab their guide books for the provinces you plan to visit. These books contain comprehensive lists of hotels/motels with prices, descriptions, and CAA/AAA ratings, and also points of interest in every city, town and major village. They are great for planning your route. I don't know if ADAC has something similar available but might be worth a quick trip to your local branch to check. Also check your local library which should have quite a good selection of guidebooks, albeit in German.
The trip we did was Toronto - Midland (
Sainte-Marie among the Hurons) - Lion's Head - Tobermory - ferry across to Manitoulin Island (it wows folks that at one point you see only water and sky, yet it isn't salt water, also the world's only island on a lake which has a lake with an island) and stay at Gore Bay, visit Indian reservation, up to Sudbury (nickel mine), then down through Algonquin Park, Peterborough (Canadian Canoe Museum, lift locks), with an afternoon at Cullen Gardens on the way back to Toronto. Niagara Falls was a separate weekend trip. We took 9 days and were pooped. The trip you describe is VERY ambitious for just a week. Huntsville is probably recommended because there are many Germans in the area, and even a motel run by a German couple:
Arrowhead Inn. (we stayed there, nice) There's also a pioneer village near Huntsville, where folks can see how early Canadians lived. Would be a shame not to at least drive through the southern portion of Algonquin.
Hmm... costs obviously depend on quality and location. There are lots of different kinds of accommodations to choose from: Bed & Breakfast can be cheap and plain or historical houses furnished with antiques and luxuries. Motel chains are abundant and generally clean with middling prices but even those can vary from location to location. Best bet would be to figure out your route, plan out where tentatively you want to overnight, and then look online for actual places and get actual price quotes. A good starting point for Ontario would be this online
Ontario Travel Guide.
Weather in October is highly unpredictable. If lucky, you'll experience one of our famous Indian Summers and have beautiful warm and sunny weather. Or you could end up with a week of rain.
Cheers!
Vera