RE: how many bucks../
A buck's range is much larger than 30 or even 100 acres. That means your 30 acres is probably included in the range of at least one big buck, maybe several. During the rut, bucks can travel miles, so your chance is probably as good on your 30 acres as it is on any 30 acres. Hunt it as effectively as you can. Try to make as small of an impact as you can. In other words sneak in and out. Maybe a big buck will pass through there. The good news is that you have big buck sign on the 30 acres, so they frequent there. Good luck.