Janice it does sound like thunderbugs they do get a lot worse when it is thundery, hence the name.
Jamie rotates OSR in the fields once every 4 - 5 years so you should be ok there. He normally puts wheat in straight after, then Barley for a few years but it depends on what your local farmer grows obviously.
There are pros and cons of living next to any crop.
We used to grow Barley next to a housing estate and at harvest time we could be baling straw at one end, and the little darlings would be setting fire to them at the other. It was a race every year.
If you have kids (sorry cant remember) please try to keep them out of the fields, at least when there are crops growing until all bales are lifted. Accidents can happen so easily with all the big machinery that we have these days. I have just spent 2 days at the Highland Show doing guided tours for inner city school children, and when they saw the size of the tractors etc they were gobsmacked for want of a better word.