That sucks! The frames in the NNBS is a lot more stout than the NBS. That's why they weigh so much more. Don't forget that the oil pick-up in the engine and transmission are in the bottom of the pan, if the engine was able to run while the truck was on its side, you may have sucked some air through.
Were you cited by the troopers?
More gas may have saved it, or applying the trailer brake via the brake controller could have helped, but it all depends on why it started swaying. Like you said, it's easy to overanalyze after the fact. Count yourself fortunate, learn what you can and move on. Oh, and make sure the internet gives you a fair valuation for both the avalanche and the trailer.
Were you cited by the troopers?
More gas may have saved it, or applying the trailer brake via the brake controller could have helped, but it all depends on why it started swaying. Like you said, it's easy to overanalyze after the fact. Count yourself fortunate, learn what you can and move on. Oh, and make sure the internet gives you a fair valuation for both the avalanche and the trailer.