RE: You're not first - what next?
I dont think you should go ahead as planned because you risk really pissing somebody off and who knows what that guy would do to the hunting area people can be real jerks. I dont think you should go home because your chances at getting a deer just dropped 100%. If you drive to another spot then that guy will still think he is the only person hunting there. Thats why I think you should park at the same spot and hunt around him. Maybe you will run into him exiting the woods or at the truck and explain to the hunter that you had scouted the area and planned to hunt it but didnt know anyone was also looking at hunting there. Maybe then you can come to an agreement without making anybody mad.