What do you suggest for attire?

Sweater tennis shoes

I pre shorts , tshirt and sneakers but my wife had to wear a sweater. What ever you would wear for a cool evening

Definitely should wear a light jacket or sweatshirt as the cave maintains a temperature of 50 degrees. Sneakers are best because it's wet in spots.

I had sandals and my feet got cold, but did remember to bring a sweater, it is pretty chilly and damp.

Dress how you would for a 50 degree night. I wore a tshirt and was fine. My date wore a sweater. It's also dirty and slightly muddy in places. So don't wear dress shoes.

Light jacket 50 degrees