is there an ADMISSION CHARGE ?

There is an.admisdion charge if you are not a member. But the admission is FREE I believe, every first Friday of the month. That might explain Mark's comments. The Milwaukee Art Museum has a similar thing, first Thursday free sponsored by a local company.

Yes. I believe it is around $8

I've have never been charged anything, and we go about 3 times a year. So unless its something recent, I would say no.