Mythbusters busted the water bag/pennies thing. Doesn't work. Allegedly, an orange studded with cloves will keep them away, but I've never tried it myself.
Have fun camping.
The orange thing (Pomander) was originally created during the plague because the stench of the corpses. I don't know if it helps with flies, but it was believed to keep disease away.
I use mosquito coils. Insect repellant in incense form, so technically, not really fire so not considered an open flame.
I did a bit of hiking last week during our trip out to Candy Rock in the Calaveras County. Holy hell I had SooOOooOoooooo much fun. I'm banged up pretty good- bruises, cuts, about 5 shades darker as well, but I couldn't be happier! Didn't take as many pictures, since I was having too much fun and also didn't want to get my devices wet. I completely fell in love with that area and will gladly drive 12 hours and back to do it again.
i can't see the pics at work
someone told me about mythbusters when we were there. at least there weren't many flies period!
i had fun going to the lava tube and kachina trail near snowbowl in flagstaff. the lava tube was about 3/4ths of a mile. it's what it sounds like, a tube-shaped cave formed by lava. the entrance is pretty rocky and a few parts are low and require you to kinda bend over. the end of the line is so worth it though. it was completely dark when we turned our lights off and we tried to sit in silence for periods which was really cool. sensory deprivation.
i will post some pics later!