In reply to Ed Booth: Was there for two weeks last year, and stayed most of it in Camp 4. After our 7 day limit we stayed on the site of a family we had become friends with, and just took down and hid our tents and bags during the day (not that you really need a tent in summer...). The Rangers are pretty strict with the 7 day rule, even if you are stood there with a handful of cash to pay for a extension on the stay. Just be sociable and there will always be someone willing to share a bear box (this is the most important thing). If your staying there beyond 7 days, pitch your tent late and get it down before 7am and you should be ok.