Ok, APT puts you in Tritons and Animators on Formal Nights. One other rotation puts you in Tritons on formal night, but Parrot Cay on the other. Can anyone guess which one that is (ok I'm just too lazy to figure more than one out right now

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As for gift exchange/grab bag, on the Eastbound PC cruise we had Secret Mickeys (like Secret Santas). We brought about 5 little gifts and gave them to our SM receipient and revealed ourself on the last day at sea.
Mine was a lot of fun. I had a tropical drink delivered to her in the pool. The CM got the wrong person

and they freaked out! Immediately left the pool area because someone was "watching" them

They got the drink to the right person next. She was leery to take it but everyone around her convinced her it was probably from her SM. Lots of fun!! We gave the person organizing it (actually two of them so they could both participate too and not know who had who) ideas of things we like (Mickey, tropical stuff, wine, etc.) and they gave that to the SM.
Captaincrash, won't work. We are doing the 7 night Magic just before this cruise and there is no way he would wear the grass skirt on a cruise without others doing it too. So bottom line is he'll have other clothes with him.