Flying

I was about 28 when I first flew, and had two work trips expected of me close together - it wasn't great, and I didn't have the skills to manage it, was just a fairly stressed robot throughout.    

Unless you start to think differently about this trip then it will be difficult, or impossible, as you have predicted things based just on what you know now, or how you think now - but if you start to think about how you can make it happen that works for you, rather than thinking its just too much, then its more likely you could do it.  You are right to be realistic having autism and crohns as well, but i imagine many with crohns fly long distance so probably plenty of advice out there from them.

You could fly half-way and stop for a day or two before flying the last half, then you only have to manage two 11 hr flights (or whatever they are), also gives time to recover.  I don't have crohns but would choose that option myself purely in terms of autism, time to rest from the first flight and management of it, then repeat.

Once you have worked on managing the fear of flying and a flight, you could then book a cheap short distance return flight and then when you fly to sydney you haven't got to face it all in one flight.

Finding things difficult is how it is with autism, but learning to find ways to do things and ways around barriers and difficulties can make a difference. 

I was about 28 when I first flew, and had two work trips expected of me close together - it wasn't great, and I didn't have the skills to manage it, was just a fairly stressed robot throughout.    

Unless you start to think differently about this trip then it will be difficult, or impossible, as you have predicted things based just on what you know now, or how you think now - but if you start to think about how you can make it happen that works for you, rather than thinking its just too much, then its more likely you could do it.  You are right to be realistic having autism and crohns as well, but i imagine many with crohns fly long distance so probably plenty of advice out there from them.

You could fly half-way and stop for a day or two before flying the last half, then you only have to manage two 11 hr flights (or whatever they are), also gives time to recover.  I don't have crohns but would choose that option myself purely in terms of autism, time to rest from the first flight and management of it, then repeat.

Once you have worked on managing the fear of flying and a flight, you could then book a cheap short distance return flight and then when you fly to sydney you haven't got to face it all in one flight.

Finding things difficult is how it is with autism, but learning to find ways to do things and ways around barriers and difficulties can make a difference.