I went to Egypt last September so very hot.
I bought a frio pouch for travelling with the insulin. I then kept it in the fridge in my room. If we were spending time by the pool etc. . I just went up to the room to inject, therefore I did not need to worry about it getting hot. I did take it out on excursions but put it back into the frio pouch.
I also took extra insulin so if it was spoilt I had spare.
Can't you get an extra sharps bin thingy on prescription?
I did struggle with the heat and was unwell for a couple of days. Not sure if it was heat or food/drinks so do be careful.x