Hey Misty....
I think you can get around the airline charge for luggage if you just carry on a duffle. I would call your specific airline. The only one I have heard of that is charging for the first piece of luggage right now is American.
The TP isn't Charmin. I am sure they get those huge cases of institutional TP...There is a
Walmart very close to GKTW, so you can buy the specific brand you prefer.
The food is good and plentiful. Since you are also from the South, think Picadilly - cafeteria style with a couple of different choices. There were 7 of us; all picky and all were able to find something they liked at every meal.
Since your meals, transportation and admission tickets are covered; the cost is not prohibitive. We spent our wish $ on lunch and souvenirs (pictures on the rides, t-shirts, mouse ears). Yes, all those things come with an amusement park price on them, but we never had to dealve into our own cash; our wish expense money covered it all.
Not sure what you are asking about in regard to how long it took to get everything finished. Pre trip planning? Wish paperwork? Amusement park touring?
We didn't forget anything important...made a list checked it twice.

The one thing we did forget was to 'deactivate' the mouse trap under the sink. We live in the woods and can't have pets for health reasons (asthma & allergies for one DS and immuno supressed system for another). We get some little uninvited creatures every so often and I forgot there were traps. We came back to a "lovely" odor.
I believe the airline needs to see his birth certificate. Those rules are changing daily, so you will want to call them and find out what they need.
~Elisa