We just got back on the 10th flew into anchorage from Atlanta, we were there for 10 days. What a blast , we rented a 26' camper just make sure when out exploring make sure you fill up when you see a gas station don't let it get below a 1/2 tank, stations are few and far between. We went anchorage to Denali which was beautiful, we did the the bus tour at Denali, long but a neat ride. Then to Fairbanks not much there. Then to Chena hot springs which was about an hour and a half. Cool half day trip they had an ice museum. Trip to chena not so pretty, Lots of frost heaves made for a bumpy road. From chena to North Pole didn't stay long there just long enough to see Santa. Then to Valdez which is beautiful. Then to Whittier went there just to drive through the tunnel. Then to Seward which rained the whole time then to Homer. We did a float plane in Homer for an hour and a half. We both flew for $600 well worth it. Flew over some glaciers and a volcano then saw some whales and bears. You'll see glaciers through out your drive. Moose and eagles are everywhere, watch for the moose they had babies when we were there and are very protective. You can't camp anywhere in the city of Anchorage. There are pull offs everywhere so don't pay for camping you can sleep pretty well anywhere. We had bought the milepost book which was worth it, it told you what was at every mile along your trip. There is a few Walmart's in anchorage to fill up on supply's once arrival. Make sure you get something to cover your eyes at bed or get something to put over Windows and door in camper and also over the sky light over the bed, cause it never gets dark. You can check this link through out your trip to see if the mountains visible. We never saw it. Don't base your trip around mount McKinley, the weather changes all the time and it's hard to see.
Have a great time.