Vitamin, you chatty Farker, you.
You are right, if raw food remains frozen in a deep freeze, it will last indefinitely as far as safety is concerned. Your cyrovaced will for sure be as good as the day you froze it, the butt might be dehydrated some [freezer burn] but that does not really change the taste much unless it is severe. I WOULD take time to defrost them in the fridge though--this will reduce moisture loss.
I frequently have stuff in my freezer for over a year, and cook with good results. As a matter of fact, I buy whole ny strips and/or whole rib-eyes from Sam's, cut them into thick steaks, and freeze them a 100 pounds at the time. Sometimes I think they are better after a few months in the freezer.