My wife and I are taking a trip to Glacier Bay, AK this August and we are planning to rent a double kayak for 5 days to do the West Arm. Has anybody done this or something similar so they can give us some tips? The only kayaking we have done so far was in Marlbourough Sound in New Zealand so it will be a little different, but the website acts like pretty much anyone in decent shape can do it. Honestly, both of us are more worried about the bears than the kayaking...