The casino boat that is running out of Freeport is the M/V Southern Elegance. She is operated by Long Island casino cruises.
http://www.longislandcasinos.net/index.php
She originally came to Bay Shore last spring
and operated by Coin Castle Casino's. That company shut down last fall after another one of their boats was seized by the feds for back taxes.
About 2 weeks ago I noticed the M/V Southern Elegance started running again out of Freeport. under the Long Island casino Cruises banner.
As far as sea sickness goes, I worked on the M/V Majesty for 3 weeks back in 1990. I can tell you that many people got sea sick, mostly at night. I would bring all the sick passengers out on the top deck and line them up in deck chairs. I brought them pretzels, ginger ale and air sick bags. Some times I had 25 to 30 passengers lined up in those chairs begging me to ask the captain to turn the boat around and go back in.
During the day, the winds are usually calm and seas flat. Also, there is a horizon to look at which seems to help sea sickness.
For the evening cruise, many passengers came to the boat dressed in light clothing. The winds and seas would tend to pick up in the afternoon so by the time the boat sailed there was a good sea breeze blowing with some good size rollers. Factor in the rollers, the boat traveling at clutch speed, the cooler temps and no horizon to look at...it all added up to sea sickness for many of the unfortunate.
My advice, take a day casino cruise and only if the winds are lite to calm. If you do choose to go at night, pick a night that the winds are out of the North, usually after the passage of a cold front.
Adam