Stik,
Over the years we have sailed to all the Frisian Islands and must agree with everyones positive comments.
The islands are peaceful,interesting places,lovely people,good food and beer!
Quite difficult navigation from the sea, but obviously a bit easier from the air.
Our favourite is the most easterly one,Schiermonikoog but I'm not sure if there is an airstrip.
Good luck.
Lister