You have to remember that everyone prioritizes things differently. Just because a park is "not recommended" doesn't mean you cant have a great time and do what you want to do. You just have to be smart about it.
The whole "avoid EMH" thing annoys me honestly. I'm paying to stay onsite and we want to enjoy the extra time in the park! So, honestly go with what you want to do and what works for your trip. If it fits the recommendations, great... if not, you can still have a magical time.
September crowds shouldn't be an issue. I was asking about
MNSSHP (which we've never been, but doing our first this September!) and I got hounded by people on the boards who wanted me to follow easywdw's schedule of "recommended parks".... really give it a rest, when the crowd levels are 1,2,3,4.... I don't quite think it MATTERS which park is "recommended." (esp for those of us who usually go in June during 7,8,9 crowd levels!)
Do as you think will be best for your trip!