A couple of answers for you;
I used a 12 & 9 easily, probably doesn't get over 25kts.
You can send stuff prior to travelling with National Jet, just take it to the airport 2 or 3 weeks before with your ticket details. That way when you fly your luggage won't weigh as much, excess costs an arm and a leg.
Food is nothing special, meals are at the Hotel at set times and the shop opens for a few hours each day, expensive and limited stuff.
Booties are handy, the lagoon has lots of coral, better to be safe than sorry. Dead shallow at low tide. Hope this helps, great spot, very chilled out.
P.S Booze is cheap as duty free.