A houseboat is a floating cabin, offering the ultimate in freedom and convenience for vacationers who want to spend as much time on the water as possible. Most rentals are on wide, beautiful waters such those in Voyageurs National Park, with hundreds of secluded bays where you can choose a home base to drop anchor. Included are the amenities for a blissful week or weekend on the water--fishing boat, electricity, furnished galley, a grill on the deck. The fanciest are more than 60' long, sleep a dozen, and might include Jacuzzis, water slides, air conditioning, and TV/DVD.