I year you, Z-F,
One year our lawn service guys blew all of the leaves out of our cemetary a week before Halloween. We had to rake up leaves out of the woods and down the street to cover the ground.
Since then, I really like to use hay. Its bright enough so people can really see the shapes of each stone and it doesn't blow around too much, which is great for covering wires and other unsightly stuff. Hay makes the entire scene come together as one mass (kinda like Necromancer "creep" in Warcraft)
hehe