I never give them the recipe unless the competition instructions specifically require it. If they just say "fill out the form", I don't give them the recipe. Never received a complaint. The judges do not get to look at the recipe. It's only for if you win Best of Show and somebody else wants to brew it, which is pretty rare unless it's a very small comp.
If they insist upon the recipe, just put a note "continued on next page" and attach a second form in the same format.