I have both a chest and an upright.

Freezer burn is caused by dehydration and oxidation when air meets frozen food. The best way to battle this is to pack food with so that no air can reach the food. It seems obvious, but even the best vacuum packing or butcher paper job can leave some air around the food.

I personally pack all of my game meat into quart or gallon sized ziplocks, FILL WITH WATER, purge out all air, and freeze.

It takes up a little bit more space but the water keeps food from freezer burning.

A few months ago I had some North Dakota pheasant that was shot back in 2005 and it tasted like it just came out of the field.

--Duck911

The DIPCHIT ADD, after a morning of drinking:

You despair, repeatedly, constantly! daily basis?
A despair ninny.
Sack up, despire ninny.