I went with the heavy-duty flatbed trailer from Wike (also a Canadian company) for my Rover:
https://wicycle.com/products/bike-trailers/heavy-duty-flatbed. It’s got 20” wheels and very well made. I also prefer a hitch that attaches to the axle bolt rather than the seatpost. They also make a kit version you can customize. I previously used a cheap kids trailer but the Wike cargo trailer is much more versatile: trips to the trash/recycling center with bulky loads and even hauls my lawn mower and tools for some landscaping work I do. But lots of good options out there !