These things seem to be structured with the whole body car camping and those wanting to stretch their legs, go on a day jaunt and return to the campfire FOOD
One of the primary advantages of the large group congregation is the demonstration of gear. (Including lots of stoves). That takes up a significant amount of time and requires a stationary stage.
As a backpacker and having just recently discovered the group hang concept, I now realize that they are two different things and both are a ton of fun.