It's not always easy to achieve a catch during the winter months because of the different variations in water conditions. It can be discouraging when the results are unlucky(empty handed) but my advice to you is ......Take each trip as practice hours;) it requires to put in your time to become...
As any good driftfisherman you can try many variations on the end of your line, for your drifting rig and flies can very well be one of them...fly gear certain limitations though.