I've been there twice now and found naturals the better option rather than egg flies and blobs although a white minkie stripped roly poly style can have big fish bow waving after your fly
The first lake on your left as you go in is rather difficult. It is the speciman lake and everyone seems to have a bash at them at first which can put them down a bit. I would suggest taking a right and concealing yourself beside the trees on the long thin lake, names are not my strong point, and casting a small dry out on a long leader.
The next lake has some cracking fish in it. I've hooked several underneath the trees near the island on small sedges and buzzers work great here.
The other lake is a bit dour but careful approach and presentation should give you a chance. Seen a 6lb+ rainbow not 2 feet from the shoreline.