There have been lots of threads about the love bugs this year. We were there towards the end of them, but they were pretty annoying. It was the worst I remember seeing them from several Septeber trips and one time that we saw some in May. We were there around the same time last year, and they weren't nearly as bad. We didn't have any problems with mosquitos. We didn't use any spray the entire time we were there, and no one got bit. So I guess you could run into the love bugs in September, but you'll probably have lower crowds than if you went in October.