BUT....nowadays, cheap, reliable commercial units like the WGI IR4 and Moultrie cams almost make the DIY builds obsolete, IMO.
Those are my thoughts as well.
I built one many years ago when self-built cameras were your only option. I haven't used it in quite a while because honestly, I just got bored with it. IMO, getting a snapshot of a buck you may never see just seems to take out the element of surprise that makes hunting more enjoyable.