The Alaskan cruising reason will resume next year (from Canada) if and only if:
- Major countries around the world have been able to "control" COVID-19 and as such, Canada has reopened its borders. Of most importance is the Canada-US border.
- Within Canada, there are no longer restrictions on non-essential travel
- An effective vaccine has been found and/or a cost effective treatments is available and/or cruise lines have a long enough track record (ie: the winter season) proving that they have been able to control COVID-19 on board.
Ultimately (and this is also in part what the CDC is trying to do with the no-sail order) is twofold
- Not having to deal with an influx of people potentially stretching the local health care system, and associated costs
- Containing local spread of local-19 by not having people that are transiting through an area undo these containment efforts
Canada has a lot to gain economically by allowing cruising to resume - yet it also has a lot to loose. Let's remember that the typical demographic for any cruises tend to include demographic that is more at risk of complications and is very different that the typical Disney cruiser...
All that to say, I'd be fairly confident that Alaska would come back next Summer but we won't really have a feel for this before later this year or mid-Winter