daywalk: When this cache was placed there was no barberry. Now, 14 years later, there's a carpet of small barberry plants all over the area. We're part of the Friends of Burns Reserve group working to clear barberry from Gerry's Rock at present - you've got to start somewhere, and every bit helps.
Sadly, everything has its allotted span. We did keep this going a bit longer than anticipated and now it's time for Atropos https://en.wikipedia.org/wiki/Atropos to snip the thread of life for this cache. All non-biodegradable waypoints etc have been removed. We'll offer a virtual find to the last two cachers on 22 March, since they posted an honest and constructive DNF and the cache was not practically findable.
However the concept is still very much alive... who knows what may happen in the future...?