I figure you'd want minimum of 3-4 weeks to get from Juneau to Seattle, but it would be so much more enjoyable to take much longer. We travel at 6.5 knots, averaging 30-40 NM per day, and spend three months or so every summer on the Inside Passage. That's enough to thoroughly enjoy either the BC coast or SE Alaska
, but it's more of a rush and less pleasure for us to go all the way from Puget Sound
to Glacier Bay and back.
There are fine marinas in Sitka, Juneau, Ketchikan, and Petersburg.
I'd also recommend the Douglass guides: Exploring Southeast Alaska, Exploring the North Coast of BC, Exploring the South Coast of BC.
I'd also recommend this map, for a handy one-piece overall view of SE AK, including maps of the roads in each of the significant towns:
For BC tides and currents I'd recommend "Ports and Passes" - a very well-done book - important for transiting the several tidal rapids.
For SE Alaska I print off a few tidal current
charts from the NOAA website. Need these for Sergius Narrows and Wrangell Narrows, but otherwise currents are not as tricky as in the BC rapids.
provides tide height information, but you can also get tide booklets at any number of marinas or fuel