This is really getting me going.  Here's something I'm rolling around in my mind.  The expense of getting out to Alaska is such that I'd like to stay on for at least another week or ten days to "justify" the travel expense.  So I wonder a) is the 10 day length of the trip fixed or could it be longer?  And b) would any others consider doing some kind of Alaska canoe trip prior to or after the river trip?