P-A. Are you ready to accept long walks and blank days?
That is something I ask people who specifically wish to target trophy trout. The rivers they inhabit often require long walks for a low population of large fish. They are the kings of their pools, and rarely tolerate comprtition for food. There are MANY places you can go to hit a few 7 - 9lb fish, but to specifically target 10lb plus, sight fishing with the dry, its a whole new ball game.
Trophy fish demand only the most stable of pools. These are their homes, and so they want sections of river where they are afforded cover and a reliable supply of food (hence the need for stable stream bed) in all conditions. They may move around a lot in these select sections, but learning to identify potential trophy water, and passing by the rest is the number one requirement of a successful trophy hunter.
One river I fish holds a low population of heavy browns. Some days you can walk for miles and not see a fish. Some days you can walk for miles and find several. When you find them out it can be very enjoyable!
Its the way these rivers work, and as long as you can handle and accept blank days, then you can turn these days into a learning experience.
One thing you can do right now is to ensure your casting and presentation is on the mark. You will often only get one shot at these fish. If you're too slow getting your fly off the keeper and onto the water, if your falsecasting spooks them, if your line lands heavily, if your well tied, super dupa fly drags unnaturally or if you are not used to casting whilst kneeling, or sometimes lying prone in the scrub, then you will not catch this hard stalked fish.
Practise, practise, practise mate. Its one thing you can do to put the odds in your favour!
Remember, finding these fish is only 10% of the battle!
Hope this helps
Chris