I have the 12X20 Alaknak. I have used this tent for the past 2 years in the Big Horn Mountains. It has weathered high winds (30-40 mph), rain, sleet, and snow very well. I am very happy with it. I would recommend getting some 3 ft sections of rebar for staking down the guy lines. Without these, this tent has a large profile and can pull out short stakes in high wind. Also, get a vestibule and a floor liner.
I would also recommend a large wood burning stove. These tents have lots of ventalation and don't retain heat like a canvas tent.
This is a great truck camping tent.
Good Luck