Is the facility open or was the first weekend of August just a soft opening? And if it is open to the public now, how much does it cost to enter?

And it is open

Free to enter.

We are open every day but Tuesdays and Wednesdays. Cost to enter musuem hall is $8 for adults. $6 for seniors and children under 12. The information center and gift shop are free to enter!

Free to enter, to see the newly added exhibit and more evidence in the back it's $8. They have recordings, photos, video etc.