I guess it's all down to how many people get down there early enough.
Last year Stu kindly saved us a large area but others who got there on the Tuesday and Wednesday basically said well we're here and they aren't so tough. At the end of the day we couldn't expect anyone to keep an eye on it for us as it would detract from their own trip.
This year there wil be about 22 of us in our group, mostly arriving on the Thursday again, but four or five of use are arriving on the Monday and are going to put up all the tents and gazebos so hopefully we should be OK. We can certainly try to save something for you Ian, but if it gets invaded while we are off drinking somewhere then there's not a lot we can do.
You could of course always travel down early??