You plan you big trips like me, far.... in advance.
My truck is the same as yourโs except a 2017, and it has a pretty big tank. I no longer pull a 5th wheel with this truck ( 35ft Open Range) as I now have a camper.
However after I figured out my fuel range pulling the 5th wheel and or the camper I didnโt worry about fuel range ever again, I just keep one of my eye balls on that gauge.
Like pigman1 says, always fill the top 1/2 of your fuel tank, especially in northern BC and the Yukon. When you start driving in the mountains, with long hills, slow curves fuel can gets sucked up fast, as your going to be putting your foot into it more often than on a flat straight hwy road.
As I rule, I never travel more than 2 to 3 hrs without stopping to do a vehicle walk around, and I usually do this when I get fuel. (Kill 2 birds 1 stone) With all the things you can stop and see along the way, you wonโt be sitting behind the wheel for long periods of time anyways, Iโll bet.
Also carry enough Canadian cash to pay to fill up your fuel tank. My wife is from Stewart BC ( north western BC) and we have over the years stopped for fuel and found that the debit/credit card machines arenโt always working, for a number of different reasons, so cash was the only way to pay for fuel.
Like others have said Generators are also an issue, however โmostโ places do have a backup system to keep essential things like fridges, gas pumps etc..running, but ya never know, just like the debit/credit thing.
I will say in out last few trips up north we havenโt run into either of the above issues I just mentioned.
Have fun with your planing.
Soup.
2018 Northern Lite 8-11 EX Dry Bath
2017 Sierra SLE, 3500 HD / 4x4 / Duramax with a 6 speed Allison Trans
Torklift Super Hitch 20K, 48" Super Truss, front and rear frame mounted tie downs
Fast Gun Long Range SS Turnbuckles, Fast Gun locks