Bushnell Aggressor in red glow or no glow. Red glow version takes better night shots. Really like the hybrid setting that takes 1-3 photos then goes to video. I'm suspicious of an Ebay Aggressor no glow @ $127 with free shipping. However I've had good luck with all the Bushnell models that I've purchased.
Hang 'em high. I lock box and cable everything, even the cheap cameras. Lock boxes make it easy to pull cards and return to the same position. Add a little spray adhesive and leaves/mosss/bark from around the tree they're going in.