I need to purchase some camera traps to be used at high altitude on Mt Kenya where it also rains a lot. The traps will be used to try and photograph owls that are very shy, so I need to ensure they don't flash or emit any other light that would disturb the birds. The photos may be taken during daytime or nighttime, but even during the day the lighting conditions are poor as it is in the forest. I'd prefer to spend in the range of $250/camera. I hear the battery life on most models now is good, ideally the batteries would last at least one month. We have to carry them in backpacks up the mountain, so weight to some extent is also a consideration. I have no experience with camera traps so there may be other important features I'm not considering? Thanks, Darcy