You could velcro a dozen or so gecko's or green tree frogs to your uncovered skin areas, but if you have pets, they may get jealous.
We use the basic Pestrol automatic spray cans in the house and they seem to work fine in killing (or repelling) flies, skeeters etc, and they do have outside units. We have 2 marine fish tanks, a cat and 2 dogs that have not been affected by the spray so it seems to be safe, and the pet flaps being used all the time does not alter the effectiveness.
Can't comment on the outdoor units but if they work as well as the indoor ones it may be worth the try.
The same company has electronic mouse deterrents that supposedly work from all power outlets when one is plugged into a power point, but our family mice living within 300mm of a power point did not read the instructions and they thrived. There is also pretty bad reports on their snake repellers.
The insect spray works for us, but mice and snakes deterrents etc........rate right up there with Hyclones.