Went on a Sunday, father's day. Was pretty busy but every group gets their own tour guide. I wish I would of known it was going to be cold in the caves, they said the weather doesn't change, and is usually 50 degrees with a cold draft, so take a sweater! Has about 180 stairs throughout, I have knee issues sometimes but I was able to comfortably climb whenever it was necessary. It's about a half mile to the little boat ride and a half mile walk back. I highly recommend it!