The camara on the feeder I wouldn't move unless you know where the preffered food source is. Probably aren't really hitting the feeder real hard this early.
As far as the best time for hunting bucks, big bucks, IMO it's the first 2 weeks of Nov. in the midwest. You didn't say where you were hunting.
Hunting rub lines can be kinda hit and miss. In my experiances a rub line usally starts close to a bucks bedding area. They are made on the side of the tree in the direction he is going, most of the time. With that said, you can back track him to where the line starts and have a look around. But in doing so you run the risk of bumping him and you don't need to give a bruiser an education, there smart enough. What you could do is hunt your way down the rub line a little ways at a time. Move 75-100 yards deeper every night or so, even every other night. Let the sign dictate your advancement. Good luck and I hope this helped a little............Kill a big one