We camped in the Lakeview loop at Tyler SP over a year ago. With your rig, it might be a tight squeeze unless they've done some trimming of the trees. I saw branches scraping the tops of some Class A's as they made their way through the loop. Fear not, there's also the Big Pine loop which is more suited to the larger rigs. Unfortunately, you'll end up with fewer shade trees and no view of the lake. But, they are all pull-throughs and with full hookups.
Also beware of the somewhat steep and winding roads leading into and out of the park. Take it nice and slow and you'll be fine.
One more thing to note, they sell firewood (on the honor system) at the entrance of the Big Pine loop, 3 logs for $1. Of course, if the current fire bans extend to East Texas and are still in effect during your visit, none of this will matter.
