We've stayed at several Riu all-inclusive resorts for just the kind of experience you're describing. No worries about meals or drinks or anything, and plenty of room on the beach and by the pool. My wife is in education, so most of our trips have been during spring break. In fact, we just got back from their Panama resort. The only thing to watch for is the distance from the airport to the resort. It was a 2-hour drive in Panama. We've also stayed in Mexico, Jamaica, and Costa Rica. Their Costa Rica had lots of bugs in the evening. Our favorite was Jamaica (Ocho Rios), in part because of the jerk chicken hut on the beach. Mmmmmm...
If you go this route, I recommend booking it with a travel agent or directly with Apple Vacations rather than through the Riu website. The price was the same at Apple, but the 2-hour transfer was thrown in for free, instead of costing an extra $200 or so.
We were going to do something different, maybe through AirBnB or something, but after several hours all the details got waaaaaaaaaay too stressful. So we pulled the trigger on the all-inclusive. 15 minutes later, the vacation was booked, and no more stress. :)