Fly choice will depend on the time of year. In the spring and autumn weighted tube flies may be required, but if the water is low flies tied on larger doubles or trebles will be sufficient. In summer bring doubles and trebles down to a size 10 or even smaller on some tributaries. The most popular patterns nowadays tend to be variations on the shrimp fly theme. A good tactic is to work the fly when it is in the water, getting the dressing pulsing can produce many a fish when there seems little opportunity.
Make sure that you have silver and blue flies such as the Medicine or Teal Blue and Silver and Silver Stoats Tail. On warm summer nights consider bringing floating lures as well because these can be very effective. It is also worth including a few dries in the box.
In the spring flies such as Greenwells and Kites Imperial will catch large brownies feeding on the prodigious hatches of dark olives. Come summer such things as Silver Sedge and Tups can imitate the large hatches of sedge and smaller olives. The river holds a population of very large brownies and whilst these can be caught on the surface in the spring by summer they feed almost entirely on fish (minnows in the main) and can be caught on sculpin patterns.