I'm new to this posting stuff but have a general question. I'm shopping for a 2012 LTZ and I'm wondering if I should look for the 4WD version or the 2WD because I will be towing a 23ft Airstream. The Tahoe is Rated for 8500 or 8300 for 4WD but I worry about becoming stuck with my trailer using a 2WD. Can anyone address this concern?