First off, welcome Nesta! I can't really add anything to what others have told you about trucks. You will notice that nobody told you get brand C,D or F. Just do your homework on weights and carrying capacities. Perhaps the best advice I can offer is to shop for a dealer, rather than a truck. Find a dealer who knows trucks and towing. That may mean a dealer in a rural rather than urban area.
We are getting quite a contingent of Montana owners from along the 401 east of Toronto. There is also another couple from Whitby. We are to the south of the rest of you, along the shore of Lake Erie, south of Hamilton. It seems most of us are heading for the Rio Grande valley for the winter. Looks like there may be a mini Ontario Rally in Texas, come January or February! We should be there by January 19.
(Presently in Gulf Shores, AL, but heading home nest week.)