I was a long time member of MDF, even help start a chapter years ago. No more MDF for me.
Do a little checking and you will find out they are not good stewards of your money. Yes, they do some good projects. I would like to support those projects, and do through other means. But far too much of the money goes to administrative overhead, and even some very questionable activities. They have gotten in bed with SFW in Utah, and spend lots of funds on non-deer related activities. It is really sad, actually. I've spoken multiple times with the leadership, and they won't be changing anything soon. (Until the current leadership is gone.)
I encourage everyone to support wildlife, and many conservation organizations. Do your own research. I prefer to support RMEF and B+C to name a few. I avoid SFW, SCI and MDF, in that order. Not that long ago I was a big MDF fan, and would support them again if they took better care of the funds they raised.
llp