Al,
I was there last August - it was outstanding. The Lanc, several Spitfires and Hurricanes, Dakota and Chipmunk in the hangar and Typhoons operating from the ASP just the other side of the wire. Tour was about an hour with an extremely knowledgable guide (as they all are) and it was the highlight for many of the cadets I was bussing round (they didn't get bored
).
Phone the visitor centre first to find out what's in residence. Also let them know you're bringing a MM winner from that period - it adds to the richness of the history of the Flight and you may get a more personalized service.
Hope you both have a great day.
R