Does anyone have any cameras that have sllep mode to conserve battery life? I have a Moultrie d-40 (i think thats the $99 one) and I seem to get quite a few pics of rear ends. I have it angled right into the corner of a corn field so it has plenty of time to catch these pics. But it seems like something has to be close to wake the camera up. Anyone else have troubles with this or is there a way to shut the sleep mode off?