Greg, heres some food for thought:

If you have been putting the cams out for 3 years now, how many 1.5 and 2.5 year old bucks do you get pictures of?

Say you got a bunch of pics of a 1.5 year old the first year you put it out, then the 2nd year you got more of him and so on. Now its the 4th year, and he would be 4.5 years old. Do you think he would "start" to avoid the camera, or do you think he would be ok with it?