On long trips with downpours, consider waterproof bags you can acquire inexpensively from most camping gear stores. They come in different sizes. I use the roll-top type with a flexible band and snap closures much like those on the saddlebags. Some gear in saddlebags won't need to be waterproofed. The OEM bags do a pretty good job of keeping out the rain as-is, but the damp/humidity can be a killer.
Not sure if I can get these in Canada, but I will look for something similar. We travel alot on the bikes and I am looking for something to make loading and unloading at hotels easier. Thanks for the advice.