I have done the other 3 Bush Trips that are in MSFS2020 so I am fairly familiar with them. I usually fly a few legs then fuel up at a landing site. Okay, I pushed it in Alaska and went 5 legs before deciding to fuel up (the 5th leg was long at around an hour of flight). I am at the airport at Nelson Lagoon and I can’t get any fuel. Naturally, I am on empty. Other than going back each leg to find an airport that actually has fuel in remote Alaska, what can I do?
Never managed to make the refueling stations work for me. Just fill her up with the keyboard command. I mean. If you are close to the pumps it’s not cheating 
There have been no pumps at any of the airports that I have seen. 
Just pretend there are some at one of the bigger ones
I guess that means I have to go back a leg or two in the trip. “sigh”
I’ve done all the bush trips too and I’ve just used the keyboard shortcut (repair/refuel?) to refuel. Depends on how much of a stickler you are for realism but, for me, it doesn’t reduce my enjoyment. Good luck.
Maybe the fuel guys only hide from bears. 
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