I have never heard of being more attractive to mozzies if you have high BG - they have always found me tasty even before I had diabetes.
As for the affect of heat - it's one of those things that vary from person to person. Generally, the heat reduces BG but that's one of those rules with plenty of exception to prove it. As usual, the best advice is to test and find out.
Don't forget to
- take twice as many supplies as you think you will need
- keep them with you on the flight; do not put insulin in the hold
- keep the insulin cool and don't use if it looks cloudy
But above all
- have a wonderful time