That's a good tip! I haven't thought about that yet. I did look the other day to see that there aren't any park hours yet for September but as soon as they are there I will try to have to schedule this. bc I the transportation answers above I already figured adding extra time for that and now i'll do this to. What would you say peak times before park opening are? 2 hours before? 3. How are they at night after getting back from the park? That was one thing I was thinking being tired from those days and just wanting to shower and lay down hahaha
September is not a peak time at WDW. I honestly don't think you will have much, if any, problem getting showers when you want. We were there at Halloween, and ever spot in our loop was occupied. Even so, no problem getting showers any time I wanted in 2000 loop, which has two comfort stations. The 1500 loop only has one, but have stayed there too with no issues at all.
If you not camping on a tent loop - I know lots of tenters still camp on other loops - you will probably have the whole comfort station to yourself as most people have their own facilities in their rigs on other loops.
Don't over-stress about the transportation issue, either. Internal buses run every 10 minutes, and I've never waited more than five minutes on one. It only takes a couple minutes to get to either end of the Fort, even with stops along the way. The stops are super fast, if they even happen at all. If nobody waiting at that stop, and nobody getting off there, they just breeze right by.
If you're going to MK, the boat holds many more people than it looks. Way more than buses. Never had to wait on a second boat. If going to the other parks, the buses come about the same intervals as any other resort, but much less people getting on them.
You're going to have a seamless, fantastic time and will see that these things are absolutely no problem at the Fort. You will love it so much that you may not want to camp anywhere else afterwards. We are lifetime state park campers, and as much as I love those, the Fort is SWEET. They got you covered there. Disney takes good care of people. There is nowhere I would rather tent camp, or any kind of camp.
Also, you will be surprised by the number of tents there. Some people I've talked to have been under the impression that the Fort is only for high dollar RVs. Not the case at all! We take our '99 pop up all the time and fits right in. You will see people camping in just about anything you can imagine, including U-hauls.