The OP can take a look at the sticky at the top of the opening page of this Alaska-Canada section. In talking to recent travelers over the different northern roads, the information appears to be fairly accurate. But changes do seem to happen from time to time. For the most part, 100 to 125 miles is about the most distance between fueling locations. Talk to the locals , especially those running roadhouses, where the next services are available as you refuel with them, or have a meal, etc.
plus you will meet some very interesting people.
One of my solo trips I stopped at a roadhouse for breakfast, the woman behind the counter asked me if I wanted breakfast? Giving an affirmative reply, she pointed to the coffee pot in the corner and went into the back. I kept waiting for her to bring me a menu, but after about 15 minutes of drinking coffee, she returned, set a plate of eggs, bacon and toast in front of me.
She told me that was what she was cooking that day for breakfast. It was very good. I paid and was on my way up the highway. After the meal.