I guess I should launch into the fray here as a happy recipient of the 'Windy Wales' magazine each quarter.
Looking back through past copies of 'Windy Wales', the general maintenance/renovation strategy for the course is as follows:
Given the prevailing weather pattern (wind 15mph+) revetting of most if not all greenside bunkers has been identified as the best way to keep the sand where it belongs and maintain consistency... As an example of a bunker completely open to the elements, take the front right bunker at #3. Most times, you have play that bunker like it was hardpan.
The decision to return some areas of the course into sand blow outs came about somewhat by accident. In 1998, there was fire at the course that hopped across the fairways and burnt out most of the tea-tree style vegetation to the left of 5, between 5 & 6, the large area that separates 7 and 13, 14 & 15, the back side of 16 etc. Because this vegetation had reached 10-12ft in some areas it had the unexpected benefit of opening up vistas throughout the course. It also exposed a lot of areas that had become grassed over or covered with ice plant etc... Looking at some archival photos from before WWII the course showed a lot of sandy waste areas before the plant life got established, so it was decided to restore those waste areas to holes 5, 7 & 15.
Because the land where the course is located belongs to the NSW Parks & Wildlife Department, their staff was all over the course about 10 minutes after the smoke cleared and declared the other areas off limits. The area between 7 and 13 for instance has long been known as the area where brown snakes have resides. When many of them were driven up towards Perrie Lake alongside the 4th hole they were welcomed by the local black snake population who preceded to eat most of them. (Ironic since a black snake bite makes a good story and a brown snake bite might kill you before you made it back to the clubhouse.) As a protected species, the brown snake habitat must be maintained.