my son is a 8 year old diabetic.
we flew from ewr to hnl and had no problems.
my backpack (kit) with all of his supplies went thru the screener with no problem !!
i gave him his injection on the plane with no problem !!
my suggest is to make sure everything you bring with you has a presription label on it and to bring a complete set of extra prescriptions from the doctor to keep with your important papers just in case.
it helps you two ways - 1) it proves what the instruments are for, 2) in case something gets lost or stolen you can just go to a pharmacy where ever you are and get them filled.
it was the first time we traveled since my son was diagnosed and 9/11 and everything was okay !! it was the begining of may of 2002.
hope that helps !!
scott