Fly Fishing Speakers

We're getting ready to line up a speaker for our big Cornhusker Fly
Fishers Spring Fling. Last year, we had planned on Lefty, but he tore
a tendon in his leg. We had Mark Seddotti come out in his stead and a
great time was had by all.
Does anyone have some names that we could throw in the hat to possibly
invite? Someone that you've heard that was a particularly good
presenter. We normally get someone that gives a presentation, ties
and gives casting demonstrations.
Thanks in advance for all your help.
Frank Reid
(yes, we pay and pay for their room and board for the trip)