you shouldnt cure bacon within a vacuum packaging as it holds the juices as it cures and will become very ssalty, as said in a dry cool box is best as the whole process really for aa decent cure is to dry it out.
Beef and lamb are one of the best meats to vac pack, beef more so than lamb, as due to it sitting in its own juices it matures, beef in a vacuum pack if say matured on the bone 1 week then boned and packaged as a full piece i would say 2-3 weeks and it will be fine.
Sometimes when opening vacuum packaged meat you will get a strange smell, this is a gas that is added into the bag, if you leave it for a few minutes out of the bag the smell should disipate, if not discard the meat product.