I've never attempted anything like that but have been to Alaska a number of times. I agree with leaving the sailboat home-as others have said there aren't a lot of places to use it. I do, however, find it hard to believe you'd venture that way without at least one spare and that you are concerned about an additional weight of what, maybe 100 lbs? As far as your concern on the space, could you mount the tire on top of the toy hauler? I would think that with those bikes not being very large it would fit inside. Just musing as I realize how jealous I am!
