Thanks George - we had considered that at one point, and your comment is causing us to reconsider it. I found the web site for Navimag, the ferry operator, and you can make reservations online, but only for passengers, not for vehicles. I sent them an inquiry to find out about cost for motos and how to reserve. We'll give it consideration. Web site says 4 days 3 nights. If we did that we might cross over to Bariloche, which we missed on the way down, and go up 40 from there. And/or go to Chiloé. As I recall, you had a very wet ride once you got north, getting across Argentina to BA!