My worst experience ever was in Banff National Park, Canada. Oh heck, I'll tell the whole story. . . .
Before we set off, we were in a store where I suggested getting head nets. My friend poo pooed the idea. I bought him one anyway and warned him that the price of it would "increase dramatically" once out in the woods.
Well, that first night, they started to get thick and I offered him the head net for only $50 (I paid $2). Unfortunately, my 20% deet wasn't working and his 100% was so I had to settle for a trade.
Anyway, we finally got chased into our tents by the buggers. I remember seeing dozens of them all lined up in the CO2 plume from my breath. Once I killed the couple that snuck in with me, it was a pleasant bug free evening. I must admit feeling an above average level of contentment sitting in the tent and seeing all those little blood suckers outside.
I will give you a report on how the Buzz Off stuff works. I'm not holding out too much hope, but it is certainly worth a try.