Expect it to be quite a bit more crowded than October. We went in June last year and found that if we went to the parks early, picked our park wisely, and used FP as much as possible, it was enjoyable. You just have to plan a little more. I wish we could go back to fall trips, but since I work for the schools now,I don't have as many vacation options. So, we make the best of summer season when we go to Disney now.