We have somewhere north of 4 dozen of the Moultree El Cheapo trail cameras from walmart. Some have been out for nearly a decade. They all stay out year round despite the weather and our controlled burn program. Just use lithium batteries and change them once a year. Some of our cameras in spots with heavy doe or pig traffic will take well over 1k pics a month - some as high as 4k a month if some dummy (me) isn't diligent about clearing brush out of in front of them.
-Doc