Oh my goodness where do I start!
We honeymooned in Florida for three weeks last sept/oct and yes we stayed in a princess and the frog room in disney, because I'm that obsessed! We did lots outside though.
Good news
Out of the holidays so theme parks are pretty quiet
Weather is starting to cool off and be less humid
The evenings are a nice temperature
Everyone is lovely and very helpful
If you go to disney ( a must in my opinion) you will have less crowds and the dining reservations are a little easier to get. Also towards the end of the month is the food and wine festival at
Epcot, absolutely fantastic and a definite must if you love good food wine and beer.
Also micky's not so scary Halloween starts in september so if there is a night that you are there and this on BOOK TICKETS! It's the second best parade and fireworks show after the Christmas one, there is trick or treating and the rides are dressed up as are all the cast members, guests, characters and shops.
Are you a harry potter fan? If so island of adventure are good, if you get a hopper ticket you can use the hogwarts express to travel from the newly opened diagon alley to hogsmead. Even if your not a huge fan it's still worth a look and both parks are great fun. Little note if go to island of adventure and plan to go on their crazy/wacky toons water rides...go in boardies and a vest top and expect to get soaked through worse then jumping in a pool fully clothed.
Busch gardens has a lot of promotions on in September, it's a lovely zoo with complete adrenaline rides and we did things like feed giraffes in an open top jeep.
Wouldn't recommend sea world, the rides aren't amazing and the whales just look ridiculous in those tiny tanks.
Disney water parcs are great for a relaxing day, if you go to typhoon lagoon make sure you snorkel with the rays and if you go to blizzard beach don't wear a bikini down summit plummet, my top pretty much flew off.
Fine dining in disney is out of this world, the yachts mans steak house at the yacht and beach club is lovely as is Albert and Victoria (ultimate fine dining) and we loved the restaurant at contemporary resort (California grill I believe), if you book it right around the time of the fireworks you can go out on the veranda and have the most amazing view with music played through the speakers before your meal. Ohana is awesome too! But the general restaurants a still rated highly with us. We are off site too and if you get a chance try an American diner Waffle House, awesome!
We also did Cape canaveral, husband, uncle, dad liked it, I was bored after two hours but worth a trip.
Coco beach is nice for a break.
Always get to parks at rope drop unless you are staying on property and don't forget to plan your days around which parks have night time parades, fire works displays and shows.
Bad news
It's hurricane season, says it all really. We got lucky in three weeks there was only a handful of storms, but when they start if you're at a park just put a poncho on and keep going, they don't last long and tend to empty the parks so less lines.
It is hot! And humid! Don't bother with make up or hair straighteners.
The average service charge is 15%-20% and your servers will expect this. We were leaving $20-$40 tips on average, although it's not mandatory it's frowned upon to not tip well and they will ask for the tip to be noted down on the bill before they give you your actual bill (in other words see what you want to tip before giving you your proper bill) cheeky and expensive so keep that in mind when eating out. You are also expected to tip bar staff if you have drinks at a bar. If you try to get away with not some waiters will ask why as they are paid so poorly Americans tend to always tip well.
Clothes
I wore boardies if I knew we were going on water rides, but you dry off quick.
On other days I wore shorts or leggings.
Shoes wise don't wear flip flops unless you know you can do 7-10 miles in them. I work sketchers go walks and didn't get a single blister in three weeks.
Also don't forget to consider your bags, will you want a big back pack on rides? Can you get away with a little over the body purse so you don't have to use lock ups?