Tom: If you have a tent or tarp overhead, dew won't be a problem. And if you pitch the tarp/tent so that you get good air circulation, condensation on the inside surfaces won't be a problem either.
Not always the case. Everyplace else ain't CO. Vek has explained the physics of this a few times here.
Tom, the best way to avoid condensation inside your shelter, is, ventilation of course as Smoke suggested, but equally important is to camp in the woods, if any are present, as they typically are in the eastern highlands.
