Quinoa is a very good crop for Alaska, if you can get the right type from the Andes. Other cold weather crops like turnip, cabbage, etc. can also grow in Alaska (although obviously only in certain areas). At best you'll have an Alaska with maybe 10 million people, highly dependent on food imports.
Resource-wise, I think Alaska is pretty wealthy in resources, but environmental restrictions prevent their exploitation. Of course, if you exploited them enough to have 10 million people there, you'd get a situation like certain parts of Siberia with tons of industrial pollution and destruction of the environment. Alaska can also easily be an energy superpower, with all the oil as well as the proposed Rampart Dam which could generate up to 5 gigawatts of hydroelectric power and create the world's largest manmade lake. Oh, and destroy a major wetland with tons of waterfowl breeding grounds as well as a rich indigenous culture.
You wouldn't be making anything that resembles Alaska or even Alaska with millions more people, you'd just be making another part of Siberia.