I agree with almost everything said, except I'd go for the crewcab. I have an extended cab, and it's just a bit tight with kids. With hunting buddies, it's a nightmare if you need to go long distances.

I must say, I was a bit dissapointed with the news I heard about the gas mileage on the new duramax engines this year. Seems they aren't doing any better as my 6.0 L gas V-8.

Gas wise, I think you're looking at $ 150/week.