You will not need to call anybody about your carrying any medication, syringes of any type, just make sure you have the label from the original packaging it came in, TSA rule. Tell them you need a wheel chair from the curb, it will be provided by the airport. The flight attendants will make sure the terminal you are flying into will have a chair meet you, you will probably be last off for the chair. Do not plan to do any walking at any airport. You will get to board all flights first, with the first class, lots of room in the overhead.

One thing I never do, even though I love it, is drink coffee when I fly. Too many trips to the tiny lavatory. on the plane.

Your family will not overload you with anything to do, if they really care about you. Do not overload yourself, just enjoy the time with family.

If you think it may be needed, have a chair rented for you there. If you have your own, you can fly with it, gate check it. The airport will provide a pusher for your own chair if needed, it will be. Also, their pusher will make it better for you. Same with a scooter, there is no weight limit on this.

One person can go with you through any special gates, only one. And, there are special ones in most places.