Though every cruise line includes something in its standard fare — be it accommodations, basic meals, and/or on-board entertainment — a growing number include truly everything. The most all-inclusive cruises cover the costs of alcohol, gratuities, and sometimes even air travel, ground transfers, and hotel stays pre- and post-cruise. So, will it be a laidback tour of the Caribbean? A luxe jaunt around the Mediterranean? Or a nature-filled ride along Alaska's wildlife-rich shores?