I had hoped to put softball size rock and larger down but it may come down to whatever I can find. I'm in farm country so you'd think I'd be able to just load up on the field rock piled up around fields. It seems to be pretty inaccessable unless you get in there in the fall though.
I had put a call in to an area gravel company, and they quoted me $4,000 for the 110 yards of rock I'll need. For that price, I'll walk around and pick rock out of fields myself!

CZ