There's plenty of good info there if you take the time to read it. Its a great lake, but with any lake like this you actually do have to pay some dues to find where and what to fish. If you have spent any amount of time on the fly, you'll be able to open your eyes once on the lake and figure it out pretty quick. If not, then asking for the keys to the mansion isn't going to help much anyway.
Look around and see what is hatching, its a good place to start.
There are depth maps online that will show you the shoals and you'll be able to figure out where to go, but its not a big lake so really that isn't a tough one here.
You should already know that it is a trophy lake so obviously it is not going to be easy or fast fishing, so asking for the key to success is kind of hard to do. Each day is different, and you will have to try different flies till you get on one that is of interest to our fishy friends.
He told you it was on an indicator so that narrows things down substantially. After that its just size and colour and you should be prepared with an assortment - change if one isn't working.