OTOH,š I love the glacier cruise out of Whittier so much that I once did it twice in one weekend from Anchorage via the railroad. At the time, there were two vendors. ( One had a newer boat, the other better food.) Anyway, we saw loads of otters, sea lions, and kittiwakes along with all 26 glaciers. Smooth sailing all the way.
On a bad day, if you get seasick, the Kenai Fjords trip is miserable once you get out of Resurrection Bay. Seriously, the company will tell you if they expect rough water, and if they offer you a refund, take it.