A friend of mine uses a fan aimed at his body. I use nothing until the mosquitoes find me then Off with deet. I try to spray it on my clothes instead of my skin but I do have to get the head, arms, neck, ankles, lower back, and face. I spray into my palms and pass it over my face and ears. Like Achilles, they will find your weakness. I read about deet and it seems that it has been in use since the 1950's with no reported problems.
Lawrence