Make your reservations early as cabin and vehicle space is limited on some vessels. If space is not available on your date of choice, ask to be put on the waiting list. Measure your vehicle for height, length and width. The size of your vehicle will determine the cost (you can use an on-line calculator to determine the price of the trip. Have passports and other documentation ready before boarding.
Save money by taking a tent and sleeping bag instead of renting a cabin. Pitch your tent on the deck or sleep in the solarium on one of the reclining chairs provided. Washrooms and shower facilities are available. If you do rent a cabin, expect the bare necessities.
Bring a cooler with extra snacks and beverages to supplement available food service. Pack books, games or crafts to keep occupied. On many vessels, members of the U.S. Forest Service and the U.S. Wildlife Service offer public lectures on local wildlife and history. Keep your binoculars handy.