When you check in at the port, you'll receive a sheet that spells out all the details during embarkation - the time that embarkation will start, times and locations for Palo and spa reservations, times and locations for lunch, checking in to the kid's clubs, etc.
It's good to double-check this sheet at the port, because you never know when something might change! Also, the Wonder and the Magic use different locations for Palo and other reservations, so keep that in mind...