With the cool weather this spring I expect the Brown Drake hatch to be in mid-June. Silver Creek has already cleared and is looking very good. My favorite Brown Drake pattern is the Nealley's Brown Drake. This is a big pattern with rubber legs and deer hair, and is very visible in the evenings. In addition, a Harrop Paraspinner is a must for the spinners.
I like to use 5x early in the hatch and as dusk approaches I use 4x. Remember, on cloudy, overcast days the hatch can come off in the mornings so always pay attention and look to see if the bugs are going. I've had some of my best fishing with few people around in the mornings once the hatch has started.
This is a great hatch to begin the season and is one of your best opportunities to land a big brown on a dry fly. It's also a time to renew acquaintances and bring a new fly fishing season to the here and now.