Hey Golden Hawk!
I just saw your pics and - dang! - thats what I would try to do:
A heavy board as stable platform and to support the weight. Deer colored wooden board - maybe stained plywood - to resamble the necks of both deer. And any sort of small post to lift them up in position, but without hinder the sight.
You can do the neck thick enough to drill a long hole and just slide them over the posts.
Hope you'll like it?! Its a two minute sketch - so I am sorry for some missing parts
Falk