Most of the hunting cameras have camouflage colored body which makes them hard to find. However, if you need something to secure this small item from thieves, we can recommend you a locking case, which is made of metal, bind with chain and secured by padlock. If the camera has MMS function, it definitely will send you message revealing the face of the thief before he manages removing the item.
Human scent spooks the game and can make it stay away from the camera area, even if a feeder is installed. When visiting the camera sight, you can use some kind of cover scent on your boots to cover your own scent. Be aware of what and where you are touching to minimize the spread of your scent.