I use a foam and estaz berry fly, but before that I used dyed spun deer hair.
The egg fly with floatant sounds pretty easy, though. Have to raid my steelhead box. One of the very few opportunities I have to catch carp on the surface. I stop at this tree in the pic watching the berries ripen every year. I have to be stealthy to not scare my chumming buddies, the squirrels. I'll look forward to your reports.