Is the old airport at San Luis still open? There used to be a nice little Aero Club there with a couple of Spanish monoplanes - they also had a very pleasant restaurant - Lomo de cerdo con patatas fritas was excellent. The airport was the original one before the 'new' Mahon airport (or should it now be 'Mao' in line with the move to Menorquin names?).
Have a good trip and give my regards to the Isla Blanca y Azul - just hope that the Tramontana isn't blowing when you're there!
Salud y Pesetas!