I don't know much about termites, unfortunately. I do know that I've had boards with what looked like old damage and broken them or cut them up to find living termites. So be careful.
On a similar but related note, mosquitoes are a real problem here (I bet that's true everywhere), but I'd never really done anything about them. I come from the school of thought that bugs are food for more desirable animals (birds, lizards, frogs) and that they ought not be disturbed. To hell with that. I got a big backpack sprayer and some bifenthrin and started spraying my yard.
Mosquitoes and most other biting insects actually live in and (mostly) feed on bushes and high grass. Spray them and shady areas of the yard every couple weeks, and you can drive the bastards out of your yard. It really works!
Edit: a backpack sprayer: http://www.harborfreight.com/4-gallon-backpack-sprayer-65040.html
(can be had for $20 with a coupon)
And the bifenthrin: http://www.domyownpestcontrol.com/bifen-it-p-226.html