I get a few questions each winter from people on this site asking for trip suggestions out of Juneau. We just finished our favorite short (from 7-10 days) trip which is a circumnavigation of the Glass Peninsula on Admiralty Island. Admiralty has the largest concentration of Brown Bears in Alaska.
Our route was from Juneau down Stephen's Passage around Point Hugh and north through Seymour Canal. A tram connects the Canal with Oliver's Inlet on the north side of the Island. Kayaks and gear are loaded on a rail cart(small)for one the mile-long trip. From there we paddled west to Admiralty Cove and then around the north side of Douglas Island. The total trip is about 150 miles. We went with 6 other kayakers and a Cairn Terrier (bear dog?)
What we love most about this route is the lack of people, ships and aircraft. It really is remote.
Pictures are on our flickr account, which is here http://www.flickr.com/photos/umnak/
We've been back three days and have gone out again so the first four images are from a one night trip.