Check this thread, which includes a review written by me in 2023 (I went solo).
Note that this is an expensive excursion. After inquiring (via email), I was quoted a price that was less than the price listed on the website, It was not A LOT lower... maybe 10% less.
Also check
this website. This option appears to be a "full-boat" option. You're hiring out the entre vessel. So you might want to bring some friends.