Howdy O. John,
I'm glad to hear you have a permit...
From U.S. Fish and Game;
"The Migratory Bird Treaty Act makes it illegal for anyone to take, (or) posses, import, export, transport, sell, purchase, barter, or offer for sale, purchase, or barter, any migratory bird, or the parts, nests, or eggs of such a bird except under the terms of a valid permit issued pursuant to Federal regulations. The migratory bird species protected by the Act are listed in 50 CFR 10.13."
This is no joke, the U.S. Fish and Game doesn't mess around with this law. They have spent millions of dollars to reestablish a raptor population in the U.S., and they don't take it lightly when someone takes a raptor (even a road kill). And, you can't just argue that you found the bird dead on the roadside, because the charge would be for posessing raptor feathers - not for killing a protected bird. And, there are private organizations, like the Audubon Society, who pay rewards for turning in violators.
Furthermore, there are plenty of turkey and poltry farmers who would be happy to sell you a bunch of feathers, you could color them to look like eagle or raptor feathers. This is much safer - much less costly.
Lastly, it would give the sport/hobby of Primitive Archery a bad name if people thought "we" are collecting raptor feathers for arrows. Remember, if we create a market for raptor feathers, someone will go out and hunt raptors for money.
So, be careful...
Canoe