In my experience, deer hit feeders harder in drought years, less natural groceries. That said, more deer probably do not make it through drought years vs non-drought years.
x2. I am convinced that the 2010-2012 drought killed more fawns (and deer in general) than initially thought. I'm afraid the 2018 fawn crop may have suffered the same fate and 2019 looks bleak without some significant moisture ASAP.
That being said, our bucks that made it through the drought seemed to have better antler growth.