I would wait until the cold war jet day in May. I've flown into that before and it's an excellent day out. The next one is on 25th May. Taxiways are a bit dodgy in places by the way. I think the museum part is only open on Sunday. However if you have a burning desire to go soon theres a decent pub in the local village. They use the runway for vehicle testing so don't know what access would be like mid week.