I think how much/if it helps really has to do with what your specific allergies are and how bad they are... in my case local honey doesn't seem to provide any benefit for me (well, apart from knowing where it comes from!), but I will freely admit that I don't indulge in a tablespoon a day either.. it's too expensive and that's a lot of simple carbs at once.

There are some people who keep bees (one hive) not far from me and I always want to stop and ask them about it.. it's always something that has fascinated me, but i'm sure like a lot of things it's probably more work/hassle than it seems on the surface