Unfortunately, this company won't book with you independently either. Here is their email response to my request to make a reservation...
"Thanks for your interest in Lighthouse, Totems and EAGLES Excursion.
It appears that you are traveling with Disney Wonder. We have a contract with them. You must book through Disney. Your child is 1/2 price and will receive a free stuffed Alaskan animal.
We serve salmon spread, cheese, crackers, fresh fruit and cookies plus all hot & cold beverages, so if you miss lunch with Disney you can make up for it with us.
Let me know if there are any other questions you may have that I can answer. Our dog Princess should be on board with us, a special treat for dog lovers. It will be my pleasure to welcome you on board.
Capt. Rob"
Oh well, we booked the Bering Sea Crab boat trip instead!