Nicest museum I?ve been through was the huge one in Cody, actually 5 museums. My wife and I drove out there for a week and a half. Stayed in Cody, ate at the Irma
+1
Also love the Museum of the Fur Trade at Chadron NE, Forts Laramie, Larned, Atkinson and Hartsuff (of course), and Mount Vernon, Monticello, and the Hermitage.
I'm not certain it's a generational thing. When my kids were young their most common quote was, "Awe, Dad, Not another museum!" Since they've grown up one has worked as a living historian and one shoots CAS, GAF, and Zoot. But in their cases it was definitely an acquired taste.
CW reinacting was never big around here, so I don't know that it's numbers have suffered the way they have in some areas.