With three kids under five, you need a beach resort that won't bore the older ones while keeping toddlers entertained—and won't drain your wallet like a theme park would. Disney's Hilton Head Island Resort nails this sweet spot: it's built for the toddler crowd but scales up without reinvention. The Don CeSar is the splurge pick if you want that "actual vacation" feeling—the beach itself is the main event, and a kids program means you get downtime. Both beat the Clearwater options for this age range because they're explicitly designed for toddlers, not just "family-friendly."