The Metolius is fishing well, especially on nymphs. Dry fly action is spotty, but being in the right place at the right time you should see Blue Wing Olives #18-20 and Cinygmula #14-16 mayflies during the afternoon between noon and 4. There are also quite a few caddis hatching including October Caddis #8 and what I believe to be Brachycentrus #14-16 (Mothers Day Caddis) along with minor hatches of several other types of caddis. 
Walts Worm and Perdigons are picking up a lot of trout and whitefish. Stonefly nymphs, caddis pupa, 2 bits, micro mayflies, zebra midges, olive scuds, leeches and rainbow warriors are all patterns to play with on the river this week. 

Stripping small sculpins and pine squirrel minnows is a fun approach to the river for trout. A larger streamer swung or stripped is always good for Bull Trout. 
The Headwaters to Allingham Bridge remain closed until May 22nd.