I'm with jekjones and traveled, hose awesome Humpback whales are one of the main reasons we go to Hawaii in January or February. LOVE them!! I have seen whales from my Ocean View
DVC villa at Aulani more than once. Most of our Hawaii time is spent on Maui, Ka'anapali Beach area and the comparison between how many whales one will see is huge. Those mama whales love to congregate in the Au'au Channel between the leeward shores of Maui, the windward side of Lana'i and south of Moloka'i. The channel is no more than 300-400 ft deep and where the mama whales are, that's where the males are going to be as well, so there is a LOT of action!!
I always follow the first whale sightings in Hawaii, and though there was a very early sighting off of Kaua'i as I recall this year, the whales have apparently been slow to leave Alaska. Some researchers think it is because it is an El Nino year. A fact many don't know is that the Humpbacks don't eat while in Hawaii. There's really nothing for them to eat. They eat krill and small fishes as their throats are no bigger than a grapefruit.
Lastly, Pacific Whale Foundation is the boat we first took for a whale watch years ago. They were fine but a lot of folks that frequent Maui, live on Maui, or are big whale supporters do not hail them as a favorite. Though it can happen to any boat on the water in whale season, they have hit these beautiful animals more than once with their boats. I prefer the catamarans like Teralani, Gemini or Trilogy for whale watches, or for an even smaller watercraft, we like some of the raft tours as well.
Bobbiwoz, so happy your trip was as wonderful as you had hoped!