In recent years, many resorts -- even all-inclusives -- are adding swank private enclaves onto their properties. Most boast some combination of luxe accommodations and private perks (think pools, beaches and concierges). But with the down economy putting a drag on upscale travel bookings, many are filling the swankier side of their properties by upgrading travelers from the main resort. How to swing it? You've got a better chance if you're already a loyalty member, have paid for a more expensive room in the main resort, or sometimes, if you arrive later in the day, when they've given up on booking the room at rack rate. Below, five of these exclusive add-ons: