Don't know if its in here but pack some extra toilet paper. You should anyway.
Comes in handy while tracking. Make yourself a TP sprinkled path if you have to.
Also, I tried to find it but failed (lousy search feature). Maybe someone could post Matt/PA's thread about his buck he tracked last year. Pure determination I tell ya. I read that thread many times last year when I was in the same situation. Unfortunately, my tracking success came months later when he was just skin and bones.
I tell you guys one more thing...I thought I gave my buck plenty of time to succomb last year but apparently did not. I gave him about six hours and then went after him. I wanted my buck and didn't want the meat to spoil.
Sometimes you can't have it both ways.