We'll be staying at Walden's Creek CG ( http://waldenscreekcampground.com )
for the first time over Thanksgiving. I'll post our impressions when we get
there.  We have stayed at King's Holly Haven (
http://www.hollyhavenrvpark.com/ ) and it was OK, but my favorite so far is
Twin Mountain ( http://www.twinmountainoutdoorresort.com ).

I stayed at Crazy Horse a while back, to far out away from all the
activities. Was not as advertised, sites were cramped.
http://www.crazyhorsecampground.com/directions.php
It would be much better the closer to town you get. Take advantage
of the trolley system, ride all around the place for a small amount
of money. Good way to get your bearings on the place and dont have
to look for parking space if you drive your toad. There are several
different routs of trolleys, color coded, but closer in the more
routs merge and the more frequently one comes along.
http://www.attractions-gatlinburg.com/trolley_info.html

Have a good time. ;-)