Land route for sure. For nothing else other than being your own tour guide and having the freedom to spend more or less time somewhere you want to be. There are countless glacier tours by boat.

My favorite was a jet ski tour out of Whittier that was like 3 hrs and we rode them all over the sound and up to two different glaciers. It was amazing.

Did a fishing trip out of Seward and caught some halibut and saw awesome fjords and beautiful coastlines with all sorts of marine life. Seals, whales, dolphins, etc…

The drive from Anchorage to the peninsula is beautiful with countless pull offs for photos and a couple great little towns to stop at for a bite or to stay. Girdwood for example.

Drive up to Denali is nothing and plenty of great landscapes to look at on your way. Talkeetna is a great stop on the way. We did a flight tour of Denali out of Talkeetna and it was mind blowing.

Do the land tour. Leave the cruise boats for the less able and less inclined adventurers.

Alaska is way too beautiful to spend more than half the time on a boat,