Not sure about Alaska, but what I find odd about the bush trips is refueling; it currently only works using a workaround, see Refueling during bush trips - Archives / Bugs & Issues - Microsoft Flight Simulator Forums.
Did you check your fuel level? I have bound that “repair and refuel” command to a key and use that during the trips, as I could not find out how to refuel properly. The usual menu options and keyboard shortcut for refueling don’t work during bush trips, even when I park right next to a fuel tank.