You could have your souvenirs shipped straight home from Disney, that would help. I am a light packer, bring the basics, and do laundry. You can have 1 personal item and 1 carry on on the plane, and depending on your airline, 2 bags in baggage. Get to the airport early to acclimate yourself, and so you don't feel rushed. I usually go 2 hours ahead of time, get through security and then relax with a good book or something. If you go to your airline's website, it will have a lot of good information about what you can bring and what you can't. If you go over to the Disney Tips section of this board, you can most likely find a packing list.
The best tip I can give you is to just relax and have a good time.