Camping around Knoxville(near the mountains)

[mc8 tin tent]

 Ok guys help me out here,Please!!!!
We have made a last min. camping plans for this wk.end  some place around Knoxville Tn.,near the mountains,we are taking my 94 yr.young mother and meeting up with our kids from Charlotte (Knoxville is about mid-point for us and the kids). I have looked at some of the campgrounds and they seem to be a little cramped (average site width 30 to 35 ft.)
   Any help or input with camping/sightseeing etc.welcome.
Thanks to all.
Dwayne