AOSTIRMOTOR - you are looking for a location to take a bunch of family and friends for an overnight camping trip where you rock climb and ride?
I cant say I know of anyone who has organized such an activity. The logistics and cost would be wild- just pick a spot and get everyone to take the time off work and life, then also the cost of travel and everything else.
You live a really cool life, if these outings are as frequent as your post makes them sound.