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You'll want to plan carefully to hit the mark on evening wear. These days, formal events on board call for both elegance and comfort.

As you pack, you may also want to avoid any items made of leather or suede, says Luke Xavier, travel expert and founder of the travel and cruise site USA Rover. This would include shoes, belts, luggage, and accessories.

Another thing you'll want to avoid wearing in the dining room is your bathing suit. "Although you are on vacation and might want to spend every minute of the day lounging by the pool, swimwear is generally not considered appropriate dining attire on cruise ships," says Marcello De Lio, co-founder of High Seas Cruising.

"Although cruising is generally very secure, it's always a good idea to leave your most expensive and sentimental possessions at home," says Smith. "Instead of bringing a full jewelry box, choose a few versatile pieces you can wear with multiple outfits. It's all about finding the perfect balance between being comfortable, stylish, and practical."

There are plenty of ways to express yourself through fashion without resorting to offensive slogans or images on your t-shirts. Warren says you should be mindful of others when you make your packing list, and not assume that everyone is in on the joke.

Comfort should be a priority on any vacation. However, unlike certain resorts where bathrobes and slippers might fit right in, cruises often come with elevated expectations for clothing.

Several of the experts we spoke to said that you should also leave all camouflage clothing items behind when you go on a cruise.

When you go on a cruise, you're likely to spend time lounging by the pool and visiting beaches at various ports. Though swimwear tends to be revealing in general, experts advise leaning conservative on cruises, which are billed as family affairs.