Get one of their brochures, either from their website or a TA. They have some deals, two for ones, free airfare, etc. If you plan ahead you can do very well. And very often if the boat is not full you can also get two for ones up to the last minute, especially on the Mississippi Queen because its larger (even though Delta Queen is our personal favorite). The website has details on special deals. By all means, try it, but beware. Very addictive!!