I have 2 sleeping bag systems. They aren't for the faint-of-heart, though! They are heavy. I have a military modular system and an army surplus bag. The modular system consists of a lightly insulated bag inside an intermediate insulated bag inside a heavy insulated bag inside a waterproof bivy shell. Whew! Talk about warm! I nearly sweat to death using this system. The beauty is that I can use all the bags, some of the bags, just the waterproof/windproof bivy shell, or any combination while in my hammock.
Hammocking isn’t for everyone, but it’s worth a try. It’s a genius solution to bad ground conditions, but you may find – in gathered-end hammocks at least – a lack of comfort at each end (lateral squeeze of shoulders/feet), as well as lower back discomfort. One need not be a back sleeper to enjoy a hammock, but it helps a great deal. Side sleeping is possible but awkward. Many are not used to having their feet elevated relative to their rear end.
While a hammock puts your closer to nature, it also leaves you more exposed to the elements. Unless you’re 100 percent certain that there will be no precipitation in the forecast, you should think about buying a rain fly. Usually made of nylon or polyester that’s coated with polyurethane, the fly will shield you from rain and snow, and also block chilly winds and trap heat. On the market you’ll find a wide variety of rainfly options, from streamlined models that weigh around eight ounces, to larger ones that weigh 25 ounces and almost cover you like a tent. While some are rectangular, others have a diamond shape, which allows you to secure the fly closer to the ground for more coverage.
Conversely, most backpackers do not understand the first thing about backpacking hammocks. There is a bit of an art to setting up a hammock and sleeping in one. Thus, learning to hammock camp may initially take more time. As noted earlier, however, there is nothing terribly difficult about setting up a hammock, and in the long term it is probably faster to set up a hammock than a ground system.