An alternative to Geet is Avon Skin so Soft.
Before travel in areas known for Mossies, take Brewers yeast tablets daily for 2-3 weeks before traveling, and rub The Skin so Soft on daily on arrival.
Over the years both have worked for us in some really 'Buggy' places.
You may stink of beer from the Brewers yeast, but you have lovely skin!