permethrin? You spray this on your clothes and let it dry so you'll want to prep before your trip. Should last the entire week you're in Canada. You'll probably want to treat several outfits so you don't have to wear the same clothes every day. Hats, socks and shoes, too.

Amazon.com: Sawyer Products SP657 Premium Permethrin Clothing Insect Repellent Trigger Spray, 24-Ounce: Sawyer: Sports & Outdoors


I would also apply picaridin to exposed skin like hands and neck and it's up to you how close you want to get it to your eyes, ears, nose and mouth.

Amazon.com : Sawyer Products SP564 Premium Insect Repellent with 20% Picaridin, Lotion, 4-Ounce : Sports & Outdoors

Read the reviews...some of those folks have used this way more than I ever have, and in harsher conditions, so...

You can then use the deet on top of that and should hopefully find your trip more enjoyable next year!