One thing that makes a surprising difference with mosquitos is to wear white or light-colored clothing. For some reason, mozzies are attracted to dark clothes.
Bees are, too. As a former beekeeper, I've seen people stung numerous times when wearing dark shirts when someone in a light shirt was bothered at all. (And these days all honeybees in Belize are Africanized, so you don't want to mess with them.)
--Lan Sluder