I eat very little dairy, I don't drink milk, I dont like cheese, in fact I can't think of any dairy I consume - but I have suffered hideously with hayfever my whole life. I don't think the dairy thing works for everyone, well it certainly doesn't for me.
As for the local honey, you have to start this early, before the hayfever season kick in. It needs to build up in your system. I tried that last year and it had little effect for me x