Done that one several times.
If you are camping on the sun-deck:
1. bring duct tape to tape your tent down
2. bring a luggage lock for your tent flaps, stuff does get stolen out of tents
3.Although they say you cannot cook on the sundeck, many people do so inside their vestibules on the sly, saving major $$.
4. Bring games, books, booze (if you drink), the bar can get expensive.