I did it 2 weeks ago. It is a class not really a tour. The cost was $39.00. The instructor is one of the photographers. I use a DSLR. I don't know if the class includes point and shoot cameras. I was the only 'student' so I had a one to one class. It was good for me to review some of the manual adjustments on my camera in order to take low light photos. Some of what I took came out very well. And Brandon who was my instructor was very nice. They have a small handout to help you remember how to adjust settings to get certain effects depending on the available light etc.
I called early the same day and made a reservation for the class. I was asked to go to the Photopass desk in Kalepa's Store about 15 minutes before the class to pay for it. Then I met Brandon and we walked down to the beach. I have used film SLR cameras for many years. It was great to be able to see the pictures as I took them and keep those that I liked.
The time it is held depends on what time sunset is.