There is no "lunch" at Palo. There is brunch, dinner, and tea. Brunch and dinner have a $10 charge, tea is currently at no charge, but does require a reservation. The dress code for brunch and tea is "resort casual, ladies are requested not to wear shorts." For dinner, it is "jacket suggested." Make all reservations in Rockin Bar D as soon as possible after boarding.
DO realize that if you can't get a ressie, there is a waiting list. If you are wait listed, you very possibly will get in. The concierge staff is allowed to hold a group of reservations for people sailing in categories 1-3. If those passengers do not use up the slots on the first afternoon, they are released to the general population of the ship...thus, the wait listed people start to get phone calls. Throughout the cruise, people do cancel reservations. Even at the last minute, it is sometimes possible to get in.
Don't know about the Wonder....I'm a 10 time Magic veteran.