North Pacific Cruise -- Blankets Included?

We're heading North by Northwest in a few weeks -- Vancouver - Juneau - Kodiak - Hakodate, Japan - Yokohama, Japan. I've been watching the weather, and it looks like 50 degree days in Alaska, and 70 degree days in Japan. So, layers are going to be key -- my question is, do most ships have blankets that you can use outside of your cabin (we'll be on the HAL Westerdam), or should I bring some?

The were available on the Pacific Princess in May and June for the cruises to Iceland and the northern parts of Norway

HAL always provides blankets for the outside -- pretty plaid ones.

If you are in a Neptune or Pinnacle Suite, at least one will be in your cabin. Other categories can ask their cabin steward for a couple or you can pick them up by the pools or from the stands on the promenade deck.

Always been available on all our Alaska cruises. In the evenings for the films under the stars they were provided on each lounger.

HAL known for the blankets they provide on cold weather cruises.