This is definitely a rub madeby a buck. That I know. The rest is a guess. It looks fairly fresh. Look at the other trees that size in a 50 yard radius. If there are others you can tell which way the buck was going by which side of the tree the rub is on.

You can say nothing of the size of the buck. If the rub is on a larger tree (3 times that size, the size of a normal man's bicep), then you can assume that a big buck made it but all size bucks make this size rub.

As for when he will be back, who knows. I am in Indiana. If you are in the midwest, the prerut is just getting started. Add to that the beginning of gun season and deer will be running everywhere. I would not set up on the rub next weekend but I would not avoid it either. You know that deer are there and that's all you need to know the opening weekend of gun season.