Hairyplane and Jude, I thank you for your suggestions which sound excellent and we will try to include these in our itinery.
However, I would have thought there must be more than two airfields worth visiting, so appeal to all other aviators who might have been to Holland to come up with a few more suggestions!
Also, if anyone has the answer to Maarten's question, we would be interested in that, as well.
Thanking everyone for all contributions to date.