When you are out riding do the things on your bike rattle so bad, that you are never afraid of sneaking up on ANY wildlife?
Something that I have found useful, Especially on the Mt bike, is to wrap everything that is in my saddlebag. I personally use an old inner tube to wrap the extra CO2 cartridges & my pack tool. I have a friend that uses old socks to wrap up things in his saddlebag. This way when you are out on the rough section of trail, you don’t have things clanking around under your saddle!
Another good trick is to wrap some of these things together with duck-tape. Then if you will have duct-tape around if you ever have a side-wall cut or similar.