HI:
Kayaking is best in Juneau out by the Mendenhall Glacier. Second best is around Ketchikan.
What you ran into on the HAL Tour Booking is probably the same thing trying to fill out the Immigration Form = 60 days prior to your cruise.
Since you're doing the standard Inside Passage cruise, I suggest going onto each Port's website and become familiar with what's available in the amount of time you will be in Port. For example, there's a FANTASTIC Whale Watching Jet Boat for 3 hours out of Juneau for about $100 + Tax. It holds about 25 passengers!
Been to Alaska on HAL 5 times and going again in September for two weeks on the Ryndam.
Any further help, e-mail me at
robertmnch_26@msn.com