A very smart former guide in Wisconsin's Driftless Area once offered the following piece of information:
"Every farm boy knows to fish worms after a rain."
Take this to the bank. If nothing is hatching, and the water has some visibility to it, dead drift a San Juan worm.
If there's no visibility, you might want to try a muddler. The theory is that the big deer head sends out some pressure waves that the trout can pick up on.