you can't be making movement swatting mosquitoes so i use these when i hunt
http://www.mosquitorepellent.com/index.asp
works fucking great 100%
2nd choice is to get some army surplus repellent
it's 10% deet, where Off and the others are like 3% or something a lot lower.
the thermocells work way better tho, i live on the edge of Mosquito Lagoon so i don't think anyone has worse mosquito problem than here...
they can get so thick here out in the swamp you can't even breathe without sucking them in