The possession of a gun on ones own property does not constitute hunting so hunting either before or after hours is a mute point.
Hunting over bait would be considered attempting to illegally harvest an animal no matter who's land you were on.
The semi auto rifle would depend on how good your lawyer really is. patrolling by walking boundary line could be explained in a court of law , where as sitting in a tree stand I would consider attempting to take game in an illegal way.