Take twice as much of everything than you think you'll need.
Take backups (finger prick meter for CGM and pens for pump ... unless you can get a loaner pump).
Take a letter from your doctor.
Keep everything in your hand luggage.
Do not put your pump through the x-ray.
You can go through the metal detector arch.
If you are asked to go through the body scanner (box where you put your hands above your head), explain you have a pump. They will either manually scan you or suggest you take off your pump which they will scan separately.
If they question this or pressure you to go in the body scanner with your pump, show them the letter from your doctor.
Be polite at all times and try not to wind up security.
(At times, I have had to smile through gritted teeth but it is better than getting them agitated.)
Then have an absolutely amazing holiday.