Very cool. A must-see if anybody is visiting the Bay Area. Isn't the night tour pretty oriented to the ghost investigator/enthusiast types?
I don't know. Anytime I have gone on the tour once you go up to the cell house with the group it is pretty easy to drift away and go on your own. I would sure like to take in the atmosphere at night.
I know some fisherman who anchor up behind Alcatraz and spend the night, they said the island looks pretty eerie when the night fog rolls in. It would be pretty cool to tie up to the dock and walk around after hours, but there HAS to be 24hr security there. I think there are signs keeping private boaters 300 ft away from the island, I have no idea how strictly it is enforced, but someday I mean to find out.
