I have an older generation of what you have with the Max Tow Package. I have the integrated brake controller.
I posted my answer on another one of your posts. My average daily throughput is 50MPH when you take into account fuel stops and going only 65MPH. My max mileage was under 600 as I am solo, almost 12 hours. I am not sure what you are capable of doing but if you and your other driver is not fatigued then go for it.
I have the Husky with my rig below but with the 1200 bars. I have two friction sway bars and only trucks passing cause me some moving around.
If you don't mind the on-the-go every day then go for it. For me this trip would be a three week minimum. Your trip sounds like fun, I will some day do the GC and BC NP.