In reply to MattH:
Think its generally OK, but at the weekend quite a few were properly taking the piss. 2 massive tents were up all day saturday* by the parking for the Grochan. 4 tents were then pitched about 5pm while the pass was still v.busy.
Generally, I think its OK if you keep a low profile (i.e pitch when its dark and pack away early doors), but I suspect its going to become a big problem if people take the piss and just gonna camp wherever they feel like it and dont keep a low profile.
*for what its worth, these people evidently weren't climbers.