I fly from many small airfields. Some do not have parking or taxi ways. How do I set this up for missions and the start location?
In msfs I usually start on the runway but before starting the flight, I decide whether to move away from the runway, not so close if possible, and then
turn off engine, and start the mission, or just decide to remain on the runway threshold, turn off the engine and start mission. I might encounter some penalties for taxi, lights and so on, but this is the odds of small airports.
Otherwise if those airports are mine, i can build parking areas with internal SDK and Dev mode.. there are some tutorials on web.. or look for scenarios also on flightsim.to