I hate leaving a deer overnight also,but I don't think the meat would be bad if the temps where in the mid-low 40's.,but around here the yotes would be the culprit.I have passed on several deer over the years,because it was too hot to leave the deer overnight if I wasn't able to make a speedy recovery.I would rather not take a shot at a deer than risk an unrecovered deer and have to wait until morning,we all know it is much harder to track a deer at night anyway.This happens way too many times people shoot a deer and can't find it then say I better back out then in the morning either the meat is bad or the yotes have gotton it ,either way it was a waste and in this instance then I agree with gmmat"I can't beleive I said that" that you should tag that deer because you did pull the trigger knowing light was fading and that it was possible you would not make a speedy recovery.