Below was taken from a recent Facebook post in a group for advice for Alaska travel. I thought it was worth placing here as well:
"Hola Travelers,
As someone *very* active in the Alaska business & tourism field (and local to Juneau/Skagway since 2009), many of you chose to NOT book thru a travel agent and do not get the information I'm about to post; and the cruise lines and online booking sites don't know (or don't WANT you to know) this timeline of how business operates in Alask