This is the one I bought. I've tested it a couple of times and I think it will work well. It gets the laptop screen up to eye level no problem, is pretty widely adjustable, and takes up very little space (less than a power strip worth) in my backpack. It barely touches the laptop chassis, so it doesn't cover up ventilation at all.
Some people advocate for the ones with built in fans, though I don't know how much of a difference that actually makes.
I landed in Vancouver yesterday and I brought an ITX computer with me from Europe and I have a few things I learned about bringing a PC from Europe to North America, but before I talk about my experience let me say I don’t know how long customs clearance takes or how long your computer will take to reach Canada. If you are going to ship your computer you might want to do it today or tomorrow. You should check with your hotel to see if they will hold the package for you, too. But before you consider it please listen to May experiences traveling and shipping a computer.
My advice: If you have a gaming laptop bring it, a stand, keyboard, mouse and headset, don’t bring a desktop system.
Even though my ITX computer is much smaller and lighter than a full ATX system and I bought a duffel specifically designed to carry a SFF computer, keyboard, headset, mouse, mouse pad, and associated cables it still sucked to carry. All of that stuff is heavy and bulky to carry though airports. The distance from one flight to another was 3/4 of a mile. If it was my only carry on it might not have been as much of an issue, but I had a backpack as well. If I had to guess the computer duffel and my backpack weighed around 20 kilo’s or 44libs (lbs). If you bring a computer as a carry-on you will always get addition screening at security. The guy watching the scanner just kept shaking his head while trying to figure out what he was looking at.
I wouldn't check a computer since the airline isn’t required to pay you back if they lose your checked bags since there is no way to prove what was lost: the airline doesn’t agree to an inventory and value of your checked bags and not having items in your possession makes it impossible to prove you owned them. You might get a minimum required by international law, but it won’t be close to covering the cost of replacing your computer and accessories.
Finally I shipped a computer to a friend of mine a couple of years ago and I insured the package for the value of the computer. When the computer arrived it was clear the 3.5” drive cage’s bolt was sheared due to sustaining a large jolt while the computer was upside down, which ignored the “this side up” markings on 5 sides of the box, and the drive rattled around the case for days while being transported. USPS refuses to pay for any of the damages, because the box the computer was in wasn’t damaged, but only after denying the claim four times stating they needed different information about the contents of the package each time additional information was provided. If the package was lost I wonder if it wouldn’t have been better than it being severely damaged. Would they have given replacement value or used value or anything at all?
For me, and it could be wrong for you, it just wasn’t worth it. I brought my laptop as well so I could use it during the 16 or so hours of traveling and I realized if I wanted to use a computer for something I would never set up my mITX computer in public I’d use the laptop.