Those are not my own pictures, sadly, but I have used that style of cover personally. I invested in a very lightweight tarp cover, specially designed for bushcraft/camping/survival. Even if you are packing in with a horse, there is no point packing a heavier option when excellent lightweight versions exist. Re-setup; in windy conditions you pitch it low and snug to the ground, but in better weather you can have it higher as a workspace. It is a very multifunctional setup, as during the day you can have it pitched high for moving around in, and low at night. However, they are obviously not inherently warm as there is plenty of air circulation. Your bedding becomes paramount. My bedding kit for sleeping out without a true tent includes a thermarest inflatable mattress (superlight weight, but essential for insulation from the floor), a very very warm sleeping bag, and the jewel in crown is a super-lightweight goretex outer bivvy bag. The bivvy bag is breathable, so moisture buildup from sweat/breathing doesn't end up soaking into your clothing and sleeping bag. The bivvy-bag was what tipped me over from "Wow, this sleeping out thing is intense" to "yep, I can do this for a few nights in a row".
Bivvy Bag
Superlight sleeping mat
Sleeping bags - pick for the conditions you are likely to face
Tarp Shelter
You get all of the above for under 3kg of packed weight.
Personally I don't get on with hammocks - I sleep on my front, and find I can't get comfortable - but for those who do enjoy them, they are great.
When you couple great kit with good bushcraft skills you can be very very comfortable.
For example, you can make a bush shelter more comfortable and warmer by constructing a sleeping platform 6" thick of branches/leaves etc... You can make a shelter warmer than any tent given a few hours to prepare.
When we made these they were warmer and more comforatable than any tent. Ideal for a few days staying in one place.