Thanks for the replies. We would have our own airstrip for other reasons, but only for turboprops. We would be looking to do the journey several times a week (maybe even daily) over an extended period. Customs clearance would obviously be an issue but infrastructure on the ground would not. The idea of extending the runway and using STOL jets to bring some of the people in and out came out of a brainstorming, and I'm the poor SLF who has to run the suggestion down! I suspect it is one of those good ideas that in the final analysis is impractical, but you don't know until you ask.