I live in sw Ontario too and its pretty flat around here
I wouldn't venture onto the 401/402 highways but the regular provincial hwys you'll be fine
80-90 kmh, light winds, light traffic
definitely not a combination for freeways in the mountains
be careful with the clutch, its tough jockeying a travel trailer enough without worrying about the clutch, I would use 4wd low range around a campground, as long as its gravel especially backing into a site. too bad there isn't a 2wd low option for manual transmissions