If you find out, let me know? This is a huge 'gap' in airport disability info at the moment. I've been trying for weeks to track down who the heck does this at things like Heathrow, with no luck. Emails just unanswered etc.
I know how I survive it, if it helps a bit in the meantime? Google is their friend: Find out which car park/transport there, and which terminal. Google it, especially Google Earth and Google Street View. The pictures really really help many of us as we can see what it looks like before we get there.
It's possible to go to an airport just as an observer in some parts, so that's worth asking about at customer information, and doing a 'trial run' to listen to how loud the aircraft are, etc. They might allow people onto the nervous passenger training days, for example? (Presumably it doesn't train people on how to be nervous? Never sure about this...)
Big hazards for me are the total bombardment of noise in the departure check-ins etc, the hugely smelly perfumes in the shopping bit, the silly flickering lighting, I get totally overfocused on the plane times and panic every couple of minutes thinking I'm going to miss my flight, and then there's the Security Guards who always think I'm a terrorist even though I'm a wee blonde mum. My body language and eye contact don't work properly, and they can't figure it out, so I get frisked thrice a visit!!
The eating areas are also often very dirty/sticky and I panic in those too. Plus then there's the clinking of cups and the noise from all the chatting.
The plane boarding is fairly OK. The plane taking off is a hugely strange sensation but I personally absolutely love it. Others may not. But the data onboard is often good and keeps us entertained with statistics and pictures and etc. Plus taking maps so I can see how far we're likely to have gone.
I hate being squashed into the seats with a lapbelt on, so that might need a soft something under it to make it feel more comfy.
Beware the onboard loos!!!!!!!!! They make a noise like an explosion when you flush them and it is absolutely terrifying. Well worth warning a young passenger about this and providing earplugs so that they don't panic too much.
That might help a bit. Or it might not.
Oh yes, and many of us love being around planes and transport, though - there's often great plane-spotting to be done, so an interesting plane types sorts of book might help too.