Meals are not included, unless specifically mentioned. Budget 50% more than you would at home.
Most important in any cruisetour selection, is to know what you are purchasing, most do not. A significant concern should be Denali park, NEVER choose an itinerary with the Natural History tour, a complete waste, missing out on a big portion of the park, don't expect much, if any wildlfe. Only goes the public road distance to mile 16. At the least you need the Tundra Wilderness tour, which goes to mile 53. Farther equals wildlife and scenery. Factor in all the transit times. They are significant. and a tour that looks good on paper, especially the shorter ones, may have all your time in transit.