There are several problems with using a vacuum sealer with backpacking food. First, with dry materials, especially those containing things like noodles and other sharp-cornered items, is that the package will soon spring a leak where the plastic is tightly stretched over a sharp point. Second, vacuum sealed packages form an irregular-shaped, hard mass. Packing these "masses" leaves a lot of air space in your food container. Third, if you vacuum seal anything with grease or oil in it (eg. Fritos, nuts etc.), the grease or oil will migrate through the entire package. Finally, if you try to vacuum seal liquids, they will get sucked into the vacuum sealers plumbing making a major mess. Otherwise, they work just fine.
I have a FoodSaver model with a "wet" setting that handles wet food okay. It's built to do that without drowning the components.
However - if you must take a bear canister, the last thing you want is a bunch of vac-sealed bricks. Unless you master the art of vac-sealing them in such a way that they all fit together neatly like tetris blocks within the shape of your particular canister. That, I would love to see.
"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzuki
Loc: Gateway to Columbia Gorge
That summer sausage is going to spoil quickly once you've cut it up and repackaged it, unless you can find a way to do this under completely sterile conditions. The same is true for canned stuff. Best to look for (or make your own) dehydrated, which is lots lighter.
It's better to buy small packages of sausage, etc. that you can eat all at one time once opened. Check the links on Sarbar's Trail Cooking website for sources.
Hard cheeses, such as real cheddar (not the processed stuff), parmesan, manchego (to name a few) will keep for weeks even after the wax coating is cut off. Wrap the cut surface in cheesecloth and air dry it when you can. Any mold on the surface can be trimmed off. That won't work with meats, where the mold (and associated bacteria) travel throughout the meat.
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey