We did the same thing this past year. I'd equate the crowds to our only summer trip (June). We much prefer lower crowd times, but the weather was great and we still had a blast. Rope drop and early afternoon FP were our plan, although we never were able to get even one 4th FP that helped (oh I can get Pirates during fireworks--great....). But we just rode what we felt like waiting for and skipped the rest. We did 2 MK days which helped with that. You'll have a great trip