I use a combination of stuff. (If they are bad, none of it will work.) I use a DEET spray on myself. I like the stuff labeled DRY the best. It makes you feel less slimey. I carry a propane powered insect fogger. But, some places you camp may frown on those. You basically have to gas out the whole campground to make them work. I carry several cans of Yard Guard. A Themacell helps too. I don't know if the Citronella candles help but, I try everything. And finally, if I am camping with electricity then I use a box fan blowing on where I'm setting to keep them away.