Kermit Weeks’ Fantasy of Flight museum and restoration center in Central Florida was a fantastic day out when I was there in 2013, but sadly it has scaled back to a very small display, with only about 25 aircraft on regular show.
According to their website, it is still possible to book a personal guided tour to the complete collection - pricey at $500 per head, but if money is no object, a fascinating view of restoration workshops as well as a vast collection.
(Kermit Weeks’ YouTube videos are a great watch as well, walk rounds and in flight video of his collection).