HI, I am 40, so what I think is important, you might not. Anyway, we just got back yesterday and I packed toooooo much, most of which were dress clothes. Forget dressing up for dinner. SOme do some don't. We did the first night and the Captains dinner. Take advantage of the dinning room meals they are great! Breakfast. lunch, dinner. When you get on the ship, go up to the Lido deck they have a buffet lunch (not the greatest but it is quick food) stick with the sandwich and salad bar towards the back. Also, buy a pop card and souvenir cup (33$ plus 5 for the cup) if you drink pop, otherwise you pay for pops plus 15% gratuity for each drink. If I were young again, I might consider buying a bottle of alcohol on the ship bringing down a glass of vodka or whatever and mixing it with the free juices and lemonades. YOu could go broke really fast if you are a drinker. The daily drink specials are all pretty good. When you actually set sail, go to the very top deck, it is really cool watching the ship barely make it under the bridge. Regarding tanning, this is a whole other topic. You have to get a chair EARLY if you want a good spot. The main pool where all the contests happen is fun, but space is limited and so is the sun, the ship blocks the sun I think the best place is one deck up from the pool around the fence and then you can look down on the "fun" and get the sun the whole day. If you are not into contests and such and don't really care about the pool stuf (water is freezing and salt water, unless really drunk, adults don't even really go in, plus they are REALLY small. I thought the one at the front of the boat was a hot tub but it was actually a pool) go to the top deck where the bb court is and set up there or right below. I personally packed our stuff on my hangers and then just hung it right up when we got there. I also brought a can of lysol and sprayed the showers (kind of moldy) but you are young and I am just a psycho clean freak with kids. I also brought a power strip because there is only one outlet in the room. Blow dryer, curling iron, video chargers etc. You do not need cash (for the boat anyway) just a credit card that they swipe and you get this sign and sail card that takes the place of your cc. Don't loose it! The Pearl island treasure hunt snorkeling WAS NOT worth it, just do the pearl island beach thing and lay on the beach and hunt for your own shells, we found more on our own than the tour. Regarding your question about anniversary, sure they do stuff for anniversaries, they will even decorate your room but YOU PAY! You can preorder on line and they will have it decorated. You might be able to tell your head waiter and he could stick a candle on your dessert but thats about it! Hint to a friend or your mom and they could arrange to have flowers or the room decorated when you get there. Hope this helps!