Kind of "basic" but we love Port A. The ease of hopping in the golf cart and cruising around is so fun. We love the little town and my daughter was 2 when we first went and she still remembers that trip (she's 5 next month). It's a great little getaway in under 3 hours from Austin.
With the ages of our kids, we opt for easy and convenient. We've done Cancun (all inclusive at Fiesta Americana through a Costco deal that included transportation) and that was another great spot! When they're older, we'll go to places with better restaurants or excursions, but for now, being able to stay on a property and have zero itinerary is the way to go.