These attractions are usually only open during extremely busy times. There is a shot that they will be open for Easter, but on an off week, I doubt it.
Unfortunately, these have been designated "seasonal" attractions. They probably won't be open during May, even though I would LOVE for them to be open.
Here is a great page for rehabs and other closings:
Both of these attractions were open when I was down there at Christmastime, but have been closed on my 2 trips since then. I expect they will probably be open for Easter week again.