From my exprience Mercer Co. is a horrible place to hunt. Just give me your aunts number and I'll let her know myself.
Seriously though, I live in Shelby Co. which is an adjacent county and Im telling you myself you have some prime land to hunt. It will be worth the 4 hr. trip as long as you stay the weekend. Just to verify what Im saying I think you should take a trip out this way and check it out for yourself.