I hammock camp and tend to setup my tarp really quite high to get better views, this means I have a pretty long tarp to cover the ends properly....
sometimes with sticks to raise a corner...
sometimes a longer distance between tree, which makes the hammock a bit bouncier - not an entirely bad thing and sometimes quite fun...
I have a ridgeline above the tarp, with the tarp crabbed to a prussik loop to tension, the ridgeline is as high as I can reach up the tree, even climb slightly up / step on roots or bulge at bottom of tree. Ridgeline has a loop alien to secure round the first tree then a Izte [sp] figure nine crab to tension around the second. The tarp is in snake skins for easy packing and deployment.
Hammock is hung purely with webbing straps [20mm] wrapped round tree with no other fixings then marline spiked to crab on a continuous loop on hammock. The crab acts like a drip ring and is under the tarp.
I use a jerven [exclusive] bag with light weight lining attached as a cocoon, heavy weight lining as a top quilt, and if colder I have a couple of underquilts I sometimes use:-
1, home made from a down duvet = heavy, warm and bulky due to poor down, full cover.
2, 3/4 dowm = warm and light weight due to high quality down, only partial cover.
3, full length synthetic = warm but bulky, full cover.