Bucks and shooting them?

I live in south east iowa we our loaded with huge white tail deer so why the hell I'm a always in the wrong place at the wrong time or can I get any tips on bow hunting I love bow hunting but I've only been doing it for 5 year so I would say I don't know much about it any help getting close to the big one like where they might hang out what time do most of the big boys show there heads any thing for this season I wanna another wall hanger that tops the rest??? And do rubs mean the buck is going to return to that spot or is it just a one time thing??????