There is "some" nightlife on Texel (EHTX), particularly in the larger(-ish) town of Den Burg. The other islands, including Ameland (EHAL) are mostly visited by nature lovers and they tend to go to bed early. The only exception to this is Terschelling, where there is a lot of nightlife, particularly for the youth (16-20 youth that is, not the "second youth" of the average biplane driver), in West-Terschelling and Midsland. But Terschelling has no airstrip and is not easily reachable from either EHTX or EHAL.
I've never sampled the nightlife in Zeeland, but I guess Goes, Vlissingen and Middelburg are all fairly reasonably-sized towns with bars and such, and not too far away from EHMZ. Lots of Germans around, too.