Hi Andrea Jane
We book valet car parking, so no buses etc with suitcases, simply drop car off very close to airport doors and then minimum distance to check in baggage.
The only way I can even start to think about getting on a plane now is knowing I can have a wheelchair through airport at both ends of journey. Otherwise I freeze in queues and crowded places. Book special assistance with your flight, no extra charge. They will speed you and any companion through all the checkpoints. Also, if you need it, they will provide a lift onto and off plane rather than using the stairs.
Sorry, can't help with advice about long distance night travel.
Don't worry. There are always other people with broken legs or severe disabilities needing even more help!