Those kill-joys over at American College of Allergy, Asthma, and Immunology weigh in on the efficacy of consuming local honey:
There is no scientific proof that eating local honey will improve seasonal allergies. One study, published in 2002 in the Annals of Allergy, Asthma & Immunology, showed no difference among allergy sufferers who ate local honey, commercially processed honey, or a honey-flavored placebo. link