Okay, so I've been living in Paris for over six months and had to deal with all of these questions before I got here. Basically, I planned in advance and began to stockpile supplies and prescription so I'd have a 6-month supply WITH ME when I went abroad.
INSULIN: So my insulin prescription happens to be for 3 vials of insulin per month, but I only use 1, so I had stock piled a lot of insulin. I brought 12 vials with me (all that would not expire during my 8 months abroad). With regards to the flight, I brought a cooler, stocked it with freezer packs and did not open it once for the duration of the flight. I had A LOT of freezer packs in there of different sizes surrounding the insulin. It stayed cold! Got insulin into a fridge as soon as I got to my apartment and it's been good ever since.
2. I had stock piled a lot of pump supplies. I brought 10 months worth (for an 8 month stay) because I'm paranoid. That part was easy. I'm still going strong in this respect.
3. With regards to other supplies, the only thing I really couldn't stockpile was strips. Although, I did get my endo to increase my prescription for strips, so I could begin to stock pile a bit before leaving. I use Medco (mail order pharmacy) that fills my strip prescription for 3 months at a time. I got a 3 month supply right before I left. Then what's great about Medco is you can manage all your refills online. So after 3 months, I refilled my prescription had the strips mailed to my parents in the US (because it's a US prescription) and then my parents just mailed them to me in Paris. Sounds complicated, but actually really easy. I have a Dexcom CGM and do this with the sensors as well. (also, my Dad came to visit me in Paris a couple of months ago and brought some more supplies) I've been here 6 months and have not had to have one diabetes related prescription filled here the whole time.
4. Then other supplies, back up syringes, ketostrips, glucagon--these are the sorts of things you don't need TONS of, so if you just have some to take with you, you'll be set.
yeah, I needed a whole suitcase for diabetes stuff, but it was worth it for peace of mind! Just in case I got trouble from airport security I had a letter from my doctor explaining I'd be living abroad for 8 months and that's the reason for so much supplies, but no one asked to see it.
I'm sort of an expert in this field, so if you have any other questions at all, feel free to message me!