For those that haven't been, I highly recommend a trip to the Air Force Museum at Wright-Patterson AFB in Dayton. They have an SR71 and Valkyrie Bomber there, and best of all, it is Free! They also used to offer tours of the resto hangers, but I thing you have to pay for those, how ever I don't think it is expensive.
https://www.nationalmuseum.af.mil/Note: NO Weapons allowed including Pocket Knives, I don't know if that is on the entire base or just at the museum, but suspect the former.
Also I see that they are not offering tour at this time, but I may contact them and see if we can arrange a group tour if folks are interested.