It's probably best to spray yourself before you get on the plane and then buy some of the local brew when you get there.
If you are bitten, run a teaspoon under the hot tap and press it on the bite, Hurts like hell for a second or two but kills the 'itching' agent in the mossie's saliva and stops it irritating, instantly. Really does work - tried it in Turkey recently.
very much so get yourself insect repellent - I was tortured - here they have a I think called Jungle Juice (something like that but it was good). I used it every day and never got bit - on the day we were travelling home I forgot to use it and was ate alive. Get something definitely.