If you tie a foam strip to the hook shank, then cover it with dubbing or chenille or whatever, will the fly be more bouyant? And if so, is it enough to be worth the trouble?

I'm thinking about a hopper pattern, and I would like to add some bouyancy to the fly. I know there are plenty of foam hoppers out there, but I just got to wondering if a foam strip tied to the shank would be of any use or not???

Thanks in advance,

PS, Unless this idea gets completely shot down, I'm going to try it anyway, but I'm at work now and just thought of it. Obviously, I'm making a real good hand for the boss man today. lol