Hi Emily! Are you in a city? I would follow the advice of others...call every tree service/arborist in your town. They save money not having to pay dump fees. In my city one of the arborists got wise and has started charging $100 to dump a load! But another one gives them free if you live within ten miles of the job they are doing that day. I found them on Craigslist where they post where they'll be working that day. Sometimes I have to put in my request several times over months before they show up so patience and persistence are required
I also get dump trucks of shredded leaves from a lawn service company. I drove around old, affluent neighborhoods where the giant oaks and maples are, and called the numbers on the trucks working in the neighborhood. Of course I don't want their regular grass clippings throughout the year, just the fresh leaves in the fall, which is the end of November here.