Yeah, you need to remember he can see a good ways off from that tree top.And if he sees you setup he will know you are not a turkey and you are busted.
I believe that if he bust you setting up like this, then your chances of calling him this season are possibly ruined.
Hecan become "call shy"
But, that is just my opinion.
You
can be to close on your set up.
If he can hear your call, you will be surprise how fast he can close the gap of 100-200 yrds.!!!
I know this seems far away, and other hunters may tell you different, but you have to keep in mind if he sees you, it is over, you are busted.
As far as where he will fly to, most likely he will have a set pattern day after day, unless hunting pressure forces him to change it.
Good Luck!