My buddy once said 4-wheel drive gets you 30 feet further than you should have gone.
Yep, a good rule of thumb is to use 2WD to get in and 4WD to get out.
Unless the AWD you get has a limited slip rear axle, what you really have if in serious stuck situations is 2WD at best with one wheel spinning on the rear and another spinning on the front. Even with limited slip, it's really just 3WD.