You NEED infrared at night if you want to keep game animals around. The normal camera flash DOES spook them, especially deer-type animals.
I would not consider a non-infrared camera for monitoring deer. No way, no how.
Even the "after glow" from traditional infrared flashes can cause deer to stop frequenting an area. They make "low glow" infrared flashes for a reason.
I'm not convinced "low glow" is a necessity but I absolutely would not use a visible flash camera anywhere I cared to shoot deer.