The Big Branch Trail and Wild Turkey Trail are fairly easy walking.  I suggest in between the ponds and travel counter clockwise on the big branch trail.  It's very well marked and you start off on the best parts the trail.  At the northern point you come close to houses and there may be livestock present.  There will be periods of hiking roads, but they aren't traveled much, and still peaceful.  I'm not sure on milage, I think the big branch with the wild turkey trail runs between 9-10 miles.  The wild turkey trail can be looped with the big branch trail.  It's unique in that it's more hilly and the trail winds through some of the valley bottoms over creeks.