OK, according to Tonya who works at the cruise place, there are still enough openings to accomodate all of us if we reserve now. The problem is that I have not figured out how to do a reservation with this company.
Here is the brochure for the midnight cruise; http://www.harborcruises.com/pdf/moonlight.pdf
I will be calling tonya tomorrow at 410-347-5555 ext. 109 to see if she is the one to take the reservations. I suggest anyone wanting to make this cruise do the same.