Hi there!
An amazing cruise line that I would strongly recommend is Royal Caribbean. The Disney Cruise Line is a good cruise line, but is guided towards younger passengers. Your son may enjoy it, but we want to make sure that your teenagers do too. Royal Caribbean has several cruise ships, but if you are looking for ones that are family oriented, you're looking at anything Voyager Class or above. These ships have the traditional waterslide, basketball court, mini golf, inline skating, rock climbing, ice skating, shopping, bingo, swimming and more! Royal Caribbean also has a phenomenal kids club, known as Adventure Ocean. Your son would be in Voyagers (9-11), and your daughters would be in Optix, which is the teen club. Kids and teens are kept occupied all night long, allowing you to catch a show, and relax around the ship in your favourite resting spot. There is a Casino onboard, however it is on one of the lower levels of the ship, meaning that those adults are far away from your cabin, and your children. You will always find passengers that drink onboard, but I can honestly say I have never seen a drunk person onboard a Royal Caribbean ship. If you do not want too many older kids, I would warn you NOT to go on any cruise (any cruise line) during President's Week. The kids weren't drunk, but were wild. If you don't mind pulling your kids out of school for a week, going when there is not a break is the best time to travel.
Hope I helped, good luck with your cruise planning!
Courtney
