What a runway tells you about a place
Before we look at aircraft, we look at the strip. It usually explains the entire trip.
Central Australia
Every charter conversation begins in the same place: not with the aircraft, but with the ground at either end. Length, surface, elevation, lighting, fuel, and whether anyone will be there when you land.
A short gravel strip at altitude on a hot afternoon is a genuinely different problem from the same strip at dawn in July. Aircraft performance falls away with heat and elevation, which means the honest answer to 'can we fly in?' is often 'yes, at seven in the morning, with less baggage.'
This is not a limitation to be argued with. It is information about the place. Somewhere that is hard to reach stays quiet, and staying quiet is usually the reason you wanted to go.
So we plan the day around the strip: arrive early, let the middle of the day belong to the country, and leave when the air has cooled. The aircraft is chosen last, and the operator is chosen because they have flown in there before and will say no when no is the correct answer.
Planning something along these lines? Start a conversation.