Another natural grasshopper repellent is Horehound. Horehound also has wonderful medicinal virtues.
There is a fungus that occurs in very wet years, Entomophthora grylli that will naturally infect the grasshoppers & can reduce the population. Maybe we will be lucky here since we've had SO much rain. But I agree with ladyleaf & I really look forward to chickens to get rid of them!
& That could be why grasshoppers are always worse in drought years.