I couldn't bear the idea of not being able to get off if I wanted to! It's all about control of course. I even hate having to wait in a queue at roadworks or traffic lights at the minute - panic disorder turning into agoraphobia apparently. Interesting subject which also includes not being able to stay in other people's homes or to have them stay over at yours, always choosing the aisle seat in cinemas, avoiding public transport etc.
Sorry I digress! I'm sure you will be fine TC. Have fun with Mickey Mouse. 
Taz x
That is me to a T Taz. Mine started about 4 years ago when I suffered a very terrifying incident and the guy involved was sent to prison. I was diagnosed with PTSD and had counselling for months.
It left me with a fear of being anywhere I couldn't escape. It was so bad at first that on my dog walks I could only go onto fields Where I knew all the holes in the hedge so I could get out quickly. Had to sit at front of buses and planes so I could get off quickly. Have to sit in aisle seats on planes and at cinema. I have got very stressed in friends cars when we stop and the doors won't open straightaway.
My tips for Toffeecushion. Take water to sip. I also have a relaxation tape I listen to and that really helps and book your seats in advance.
That's me too, and sorry to go off topic, but it's just so helpful to know I'm not the only person. So sorry to hear about that incident PF and sorry you suffer too Taz. The only person I've ever told is my OH, and I don't think he fully understands because it's so hard if you don't experience the feelings first hand.
TC, I've flown many times despite the above (and Thanks to being a totally stubborn whotsit!) and I find the following helps:
- tell the flight attendants you're a nervous passenger
- take music and your own over the ear headphones so you can use them for the entire journey to block out noise
- take a variety of distractions (puzzle books, reading stuff, etc.)
- take stuff to plan your visit so you have a job to do
- with some airlines you can check out the inflight entertainment before you travel so you can see if there's anything you want to watch (something to look forward to)
- if there are empty rows ask if you can move (if you have unwanted companions in your row)