I bought a half of a steer 2 years ago and finish the last of it about mid march. Everything was fine. However, I think there are some things to consider. The meat should be wrapped in butchers paper. The freezer should average in temperature around -10 degrees. I done this for years and have had no problems. It is important to "rotate the product" so as you don't find something 3 years old. I think pork freezer burns easier then beef, because it's a drier meat to begin with.
On the other hand, a half of a beef is really too much meat for a couple, and we usually do get a mixed quarter. That seems to last about 9-10 months which is what I feel is better anyway.
It's the better way to buy beef. Pay a little more for high grade hamburger and way less for those delicious 1.25 lb T-bones.
Wayner