I have had to fly 10 times in the last 2 months and I have found wearing warm loose fitting clothing helps me alot. A wheelchair is a great idea because you will have an airport tenant that will be there to assist you and it also helps with security because the person working will have a visual que that you have a medical issue (I have found that strangers often have never heard of CRPS and therefore don't realize how delicate our effected limbs actually are).
Also, in relation to medications I always put them all in one ziplock bag and I place it at the top of my carry-on luggage belongings. I never put my carry-on in the carry-on storage compartments for fear of someone taking my medications so I make sure my carry-on is small enough to fit under my seat. I have had no issues with my medications in relation to airport security and theft/losing it. Hope you have safe travels.
Sarah