Have you ever seen those signs "Clean Fill Wanted" well when I see them I stop and ask if they take yard waste my current spot will not be filled in for at least 3 years maybe longer I have my fingers crossed. Another place is an organic farmer there is one in my area every fall he puts flyers around town asking for leaves havent been there yet but will remember him once the big hole is full
My county runs a few sites where lawn clippings etc. are diverted from the solid waste stream and recycled into compost and wood chip mulch. They accept yard waste at no charge and the compost and wood chips are free.