You may want to add a few Bead Head Pheasant Tails ( #14, #16, #18 ) to your list just in case the surface feeding drops off. You can always drop one off the bend of a #14 or #16 parachute Adams, dead drift one or hang one under an indicator.
Now if you were to ask Byron he'd recommend three different ones: Green Weenie, Green Weenie, and finally, a Green Weenie!
I, personally, have never caught any species of anything on a Green Weenie (even tree species don't like mine), but I know people who swear by them.
I'd take Byron's word for it....