Originally Posted by LJDellar
Personally, I find excluding draughts and water more important than thick insulation, but I have always slept warm anyway.
In winter, the UK is WET cold (not dry and frozen) most of the time. People die of exposure on the hills in the UK because they do not dress to keep themselves dry. The same applies to sleeping arrangements.
The same applies here in the Southeastern US in Winter. It's cold and wet....until it gets cold and frozen. Keeping insulation dry is critical in multi-day trips. Down might be fine the first night, but unless treated properly, precipitation, perspiration, condensation and respiration can leave one with an expensive yet ineffective insulating system. Using a good tarp pitch can alleviate all the above. You need to be covered to block precipitation while leaving enough ventilation to dry condensation, perspiration and respiration.
In short, extreme weather hammock use requires the proper techniques along with the appropriate gear. One without the other can work in less extreme situations, but both are required when the conditions worsen.