I am in the exact same situation. I hunt frequently and it has scared me to think about what I might be able to actually do to fend off an attack. Last year here a man was cutting a small pasture on a tractor and disturbed a hive of them and after jumping of the tractor and trying to run for safety he only made it around a quarter of a mile before being overcome.
About all I can do is to watch and listen for bees, and try to avoid hive locations. A local beekeeper once told me that Africanized bees have a warning behavior of flying into you, so if you notice bees bumping into you, go the other way. She said that if you were to swat one, though, the pheromones released by the dying bee would definitely trigger an attack.