For a day trip I'd also add Midden Zeeland EHMZ
Apart from the lovely airfield itself and the decent café there, rental bikes are included in the landing fee and make for a leisurely (flat!) ride into Middelburg, cutesy pedestrianised town centre with excellent selection of eateries of all types.
Kemble, 'The Aviator' I believe it was called, but I think this closed down some time ago.
"Av8" is very much still open -
here is their website
B.