When I do them I make them all a uniform color.
If they are paying good they get a logo in one color, if not (usually the case) they get the business name.
I find this makes everything equal, just the name written out in a real nice font, everything the same color. Also gives a nice uniform look to the event and saves all that scanning and cleaning of the low-rez .jpgs they provide as camera ready art.
Someone here (last fall I believe) posted a really cool golf sign idea.
Sorry for the vagueness but maybe they will see this post and chime in.
Love....Jill