Stadtlohn. I remember that from my para-pilot days (5 years ago).
I was also at Spieka, the grass strip beside Nordholz. It is a civil strip though you have to talk to Nordholz to get in.
Their hospiltality was first rate. I was stuck there overnight and got put up by one of the Nordholz ATC chaps who also does the bar.
Turned out the aircraft stayed for ten days!!!
Have a nice trip next week!