Actually, many of the "near neighbors" of the OCF make some extra money supplying camping space.  However, I'm sure others don't like the traffic and the noise. I think the Fair Board has worked hard to "clean-up" the event and limit the inconvenience to neighbors, especially over the last 10 to 15 years.  

I happen to be a "non-fan" of the J. City Scandanvian Fair.  I simply avoid going to town during that period.  If I lived near the OCF venue, I'd make all the arrangements possible to avoid the inconveniences which accompany it.  I'd also contact the organization and make suggestions regarding how they might further limit inconveniencing the neighbors.