Thanks for the responses!!! That's really sad for the Blue Bus owners. It seems like the permit restrictions were new and sudden. Since their livelihood depends on these bookings, it's such a shame that the rug was pulled out from under them only 2 months into the season. I can understand the need to restrict the number of people allowed at the glacier, but why so sudden?
I sucked it up and decided to book the Mendenhall Glacier Experience through Holland America and pay $15 more pp for only 2 hours at the glacier instead of a full day. Because our sailing is in 3 days, it would not allow us to book through the Navigator app or online, so we called Holland America and successfully booked the excursion.