Yeah, there's no MAJOR advantage to any of the locations, with the exception of the distance some people would have to travel.
TWO has a great atmosphere, and wonderful food onsite.
It's a little over two hours to the Dragon.
BRMC has OK food on site, is a little closer to the Interstates, has good roads nearby, and is an hour and a half, (or less) from the Dragon.
There are a few more places to stay around the Dragon, now. Once you get tired of the Dragon, you still have to ride a bit to get to good roads, and there's more traffic.
I kind of like most of us staying at the same place, which allows more 'social' opportunities. The campgrounds kind of promote this....
I don't have any major preference....