If the exhibit is sold out, is there anyway to get onto a waiting list or if we show up for any cancellations, is that available to people?

I'm not sure. Certain days maybe sold out, however this show runs into September. A friend just recently purchased tickets for a June showing.

I'd just buy tickets for a non sold out date or like everyone else is saying, just call and ask

I would just call,they have someone taking calls

I'd post locally to your town Facebook and next door pages.

I don't think so. Honestly I'm not sure. Call ahead.