If you want nothing more than a screen I've found nothing seems to work better and is less expensive than Egyptian Wheat. (yes I know all the arguments about it being in the shattercane family, but my experience is that it grows one year and doesn't come back.) I don't think it provides much wildlife benefit though, other than to birds.
Last year we screened our beanfield plot with corn, worked well as a screen but deer/coons ate all the ears in about a week, long before they matured, so served no use as a food plot. This year we're trying milo and sunflowers as a dove plot to screen the beanfield plot, but they're not getting the height I want. Might do the Egyptian wheat again next year, at least add it to the mix.