Yes we put in at Beaver Creek and fish up and down stream. It is best if the Rock is running a lot of water and we have a bit of wind. Most people (even locals) don't think these things are around till March or April.
One year we caught 1800 before the first of March and 2800 during March. When April arrives you can hop from boat to boat they are so thick. That is when I move on to the green fish 100 mile to the north.