Are you close to a mainish road? I saw a sign the other day at the end of someones drive offering a 'free tip for clean hardcore.' Worth a try maybe as some people will pay to dispose of theirs at a local tip.
If you ring your local skip companies, they'll bring it to you. They have to pay to tip it so they're onto a winner. Make sure it's fairly clean stuff though, you don't want plasterboard or soil in it as it'll spoil the drainage, just broken bricks and bits of concrete