A subordinate bird will often gobble when far away, then slip up without strutting or gobbling
Yup, that's exactly how he came in.
Your best bet is to make your setup in a place where he can't see a long ways off. Like just over a knob or in a semi-thick area. Make him come looking. Being in an area he can see 80 plus yards is trouble either way. Think about it.
Wow, that never even crossed my mind. Thanks for the tip.