I have two Bushnell cameras - one is an older (~2009 or so Bushnell Bone Collector) and the new is a 2013 Bushnell HD.
I normally put the cameras up in Aug/Sept with last year's batteries in them and put fresh batteries into the camera in Nov right before deer season. These batteries will finish off the season, and get me started next year. This makes sure I have full charged batteries when it matters (once it's cold) - but I'm still making the most of my Bushnell's great battery life.
I'm VERY happy with my 2009 Bushnell, but I may be contacting Bushnell over my 2013. It seems to occasionally have a slow trigger - which I know isn't normal.