There is the Chevrolet Nationals in Carlisle that same weekend - always a point of contention between those two entities. Its a real shame.
No doubt you 'll see great Camaros there, but that's it. All the really nice cars are indoors for judging. All the rest are relegated to being outdoors (albeit one / two covered bldgs for other special cars). BUT - it is a neat place to go for Camaros (and Firebird) owners.
Not many vendors, not many food vendors. There is McD's down the street.
At Carlisle its a totally different story. Lots more different cars, indoor bldgs with special Camaros / Chevy's being judged. Its a different atmosphere with plenty of vendors / folks emptying their basements and garages with parts, etc. Plus a variety of food vendors. Its a hit with me and my buddies.
Both venues are great if the weather cooperates.
To me, Carlisle /Chevy Nationals is the better place - IMHO. But everyone has an opinion.
Do both if you're coming from a distance.