I have known guys a long time that were not neccessarily good friends. Good friends think alike and never seem to have arguments they remember. Shooting in a designated no shoot area is a major no. He didnt respect it as a guest, it is unlikely you will have rules agreed upon as a partner. That he found the dead buck certainly should make it his, regardless, if you wouldnt have found it otherwise. If you take a partner, make sure you write out the rules (including no hunt zones, which you could flag lightly with ribbon or such, and give a walk around of), keeping yourself as the primary payor and manager of, so you can enforce the rules- fairly.