We booked a room at the Hyatt in Aruba for our port day.
http://aruba.hyatt.com/hyatt/hotels/index.jsp
It cost us plenty of points, but DH has accrued quit a few Hyatt points with all his travelling, so we're splurging. The Hyatt is right on the beach. Looks beautiful. This way we can spend plenty of time on the beach, but also use the pools, have a cool room to relax in, and use the Hyatt Regency Club (can you say free happy hour??).
I think someone had asked me to let them know about a day rate at the Hyatt. I can't remember who??? Anyway, the Hyatt said they do not have a day rate, but they said we could have an early check-in because they don't anticipate being very busy. I didn't check on the price as we're using points. Sorry.