You're going on vacation to Springfield? I'm so sorry.
Grew up in the Hartford area, so Springfield was a short drive away. Been at least a half dozen times between 1990-2010. They opened a new building in 2002, so it's all very modern, personally I liked the old building better though.
But the HOF is definitely cool. If you've ever been to a science museum, it's like that, but for basketball. They have interactive exhibits (like how high can you jump, what's your wingspan compared to guys Muggsy Bogues, Shawn Bradley, how big is your hand compared to Michael Jordan or Kevin Durant, how big is you foot compared to Shaq, etc. Some virtual reality stuff out of the
Nick Arcade era. Lots of jerseys, shoes, and balls on display, and regular museum type exhibits (built mostly around balls, shoes, and jerseys). And it's all kind of built around a basketball court you can shoot around at.
Why I like the old Hall better is because I feel the actual enshrinement piece is pretty lacking now.
It's just pictures on a wall. The way I remember the old HOF, it was more of winding hall with actual plaques (IIRC). But the entire museum is still pretty cool.
If you like basketball, you'll definitely have an enjoyable few hours there.
And if you go during the weekday, it'll be dead (unless there's some school field trips).