The best way to preserve meat is, first off, get the hide off the animal as quick as possible. You can gut your deer or de-bone it. I like de-boning, that way I can carry no bone wieght, just meat with me. If you de-bone, you don't have to gut it at all, just start skinning right away (they make some DVD's on this subject too that can buy) You can get ALL the meat this way, you can even get the tenderloins if you do it right, and you don't deal with the guts at all. All that is left is a skeleton and guts inside it.
If you rather gut it and are more familiar with that method, be sure to gut it first as soon as possible, then get that hide off ASAP.
Go to Walmart and buy a few packs of basic white pillow cases. Pillow cases are more durable than game bags, they breath perfectly, they keep the flies and the dirt out. And they are durable enough to be tied shut and strapped on a frame pack...or you can sling them over your shoulder and carry them out that way too. You could put a whole deboned coues deer in 2 pillow cases, easily. I put an entire de-boned elk last October in about 4 or 5 pillow cases (50 lbs of meat per bag). Also-- go to the hardware store and get a few packs of the little rectangular straight razors to aid in skinning quickly. They are cheap and they are lightweight to carry. Once the deer is skinned out, cut the meat off the bone (just follow as close as you can along the bone) and put the meat pieces/chunks inside the pillowcases. Tie the pillow cases shut and pack out them with your hide and horns also strapped on your pack.
Once you get back to camp get it on ice, but when you do this, take the meat out of the pillow cases and put them in a plastic bag to prevent the meat from getting water damage. Plastic bags are OK if they are sealed and placed in a cooler with lots of ice, otherwise never use plastic bags because they do not breath and your meat will spoil fast, especially on a packout.
The other reason I like de-boning the meat is because there is a problem that can sometimes happen with leaving meat on the bone. Many hunters don't know about it, (but butchers do) and it is a term called bone souring. That is when the meat spoils from the bone (from the inside out). This happens since the deep parts of the meat and bone take a long time to cool. Most hunters don't know their meat is bone sour, until the butcher cuts it off the bone....and it stinks like rotting flesh. One butcher that I know, had to clear out his entire shop because of some guy's elk had soured, and he didn't know until he cut into it. The hunter had thought he done the right thing by skinning and gutting it right away on an early season October hunt---he even hung the quarters in a cool place,
but the meat did not cool to the core and it got bone souring.
Sorry for writing a book...but hopefully that helps you out.