In Denali normally the best thing to do is the 7-9 hour bus tour. I assume it's off for this summer. If so, ask the rangers for advice. On the way back to ANC, you pass straight through the very cute town of Talkeetna. You also pass through Wasilla, home of Sarah Palin (we met her when we were there!). And you also have the Iditarod Museum nearby as well. The Alaska State Fair is in the area, though I don't know if it's on this year, and if you'll be there at the right time, but we really enjoyed it. Near ANC, you have Alyeska to the south, and Hatcher Pass with Independence Mine to the North (?). You could also try to squeeze in Knik Glacier boat tour (amazing!).