I need some recommendations from people who successfully "sleep under the stars" on the East Coast.
In the mid-Atlantic area, humidity is generally around 80%, and night time temperatures drop below the dew point in the spring and fall (which is usually around 70 deg's F).
There is generally enough dew that even synthetic insulation starts to feel clammy at 2am, and chilly by 4am when cowboy camping. There is very little opportunity to dry a sleeping bag out during the day, due to the high daytime humidity and short lunch breaks. (I have a "regular nylon" sleeping bag shell, not a WP one).
I currently use a large tarp and ground sheet that covers most of the area under the tarp (since it's hard to find areas without a lot of vegetation). I'd like to cowboy camp when there is no rain expected.
Is a bivy sack with a breathable top likely to work ? Would using a larger ground cloth, and laying a layer over the top of the sleeping bag likely be better or worse than the bivy ?
Thanks.

