Is it possible to segregate your buck hunting from your doe culling? Maybe invite a trustworthy friend with a rifle to shoot does exclusively from a rifle set-up stand. Get a feeder and kill does there.

You're assigning some statistical signicance to sighting differences thatare probably a result of other factors (you mentioned elusiveness, other 'hunters' etc). My plan is to continue killing does at periphal stands, hunt the biguns at my prime spots around Halloween and hope the dog hunters don't spoil the last three years' work.