Alaska cruisetour combines glaciers by sea, Denali by rail and wilderness lodges in between. Here's how to plan the perfect Alaska cruise and land tour, and why the time to book is now, with both the 2027 and 2028 Alaska seasons already open. Most Alaska cruise vacations stay on the water. You sail the Inside Passage, see a glacier or two, explore a few port towns, and sail back. It's a great trip, but it's only half of Alaska. The other half is inland: Denali National Park,