Here is another good suggestion: Shallowcreek RV:
http://www.shallowcreek.com/
EDIT, just to add another campground: Antique Capital RV in Gladewater.
http://www.antiquecapitalrvpark.com/
These are the two closest parks to Kilgore, and either one could be a good choice. Shallowcreek is 6.7 miles from Kilgore and Antique Capital is 13.9 miles.
So you have two pretty good choices, depending upon your inspection.