I just wanted to share what I've done and get ideas from others.
There are two things I've done recently that are simple and cheap, but make all the positive difference.
1) For $15 I get a nice wood plaque with photo of the harvest imprinted on metal and engraving with hunt info. Looks nice and adds nicely to the mount, easy as emailing photo and paying $15.
2) Instead of looking for a stud or having a drywall screw with mixed success, I've started using all toggle bolts. With toggle bolt on inside of drywall and washer bolt on outside it is perfectly secure.
Use of simple plaque.
use of toggle bolt (prior holes were unsuccessful drywall screws).