Google Earth image shows runway and taxiways closed markings, and a large number of articulated trailers parked on the western half, so I guess not used for aviation at the moment. That is not to say the USAFE do not have another use for the base, logistics centre for example (unless all those vehicles are nothing to do with military), or a housing and administrative centre for satellite units (outlying stations, not those things up in space).
Perhaps Herman TC can add something to help us understand.
Endorse all the observations about the Fens and its towns and villages; I once got completely lost at night returning from RAF Upwood to Finningley after visiting a girlfriend. Flat, featureless, lots of dykes, no lights, no road signs (BTW, I'm talking about the fenland, not the girlfriend...); even thought I could hear a banjo and guitar duelling in the background.
Mister B