Our main problem in NZ camping is Sandflies, I find myself with an allergic reaction to sandfly bites, usually a day later. When we lay down to sleep, and look up, usually the tent is covered in them - on the inside. We hung the mozzie zapper and the sandflies were gone with a crack. If reports on youtube are to be believed, this is a US invention. Nonetheless a clever use of UV LEDs, and the HV grid of course. All rechargable from a USB, battery bank, or car USB. Other brands are also avail...