I also just noticed that your Jeep is the 3.8 liter V-6, so you really want to stay very light on towing weight. You will be fine for normal use (I tow a 19' with a 4.0 liter V-6) but if you are going to the far north you will get into situations that are not normal.
The main problem is mud. The gravel mix used on the roads is not always consistent and if it rains (which it will) and you get to a section of road with poor gravel (which you will) to where your tires start cutting in 2, 3 or 4 inches into the mud (which you will) and then you come to a steep hill with a 6 or maybe 10% uphill grade (which you will) you need a lot of plain old horsepower or you aren't going to make it up the hill. I assume you are 4x4.
Anyway, there will be sections of road where you come around a curve and there in front of you is a 1/4 mile stretch of road where all you see is 2 deep ruts down the center, puddles of water on the sides, and you are hoping that you aren't going to drag bottom. Because if the ruts are deep enough for you to drag an axle then you are done. So what do you do ? You quickly drop a gear, mash the throttle to the floor, hold your breath and don't stop because you know if you stop you will never get started again.
Those situations just are not fun. I have enough "flash-backs" of them to where I know that the next time I go there I want lots and lots of horses... (or somebody will maybe say torque...) whatever, I know I need more than my 4.0 liter V-6 has so until I get a stronger tow vehicle the far north is off-limits for me.
Also, here is a link to a comparable road in the far north, although this one is in Russia it is about parallel to the road to Inuvik... Note, I am not saying the Dempster Hwy is anything like this, but....
Russian Highway from Hell