In reply to Jus: Nah, you're allowed bivvy overnight (you could even pitch a tent, if ou ptich it late & take it down early). You're just not allowed to set up the preverbial camp. Somewhat akin to the french attitude in the likes of Cham.
There are loads of massive holes under boulders there to bivvy in, spent many's a night under the boulders there back in the day. Nowadays we tend to just drive down for the day, unless there's somewthing on eg. bouldering meet, in which case we sleep in the hut.