Shelter from the elements (wind, rain, snow, sun, heat, cold, etc) is an often overlooked aspect of training and preparedness in the field. A tarp, some 550 cord/bungees, a Ridgeline kit, and a few tent pegs can go a long way in being able to create a Shelter. Whether it's for weather protection or to provide camo for a hide or OP/LP, it's vital that you practice using a tarp, Basha, poncho, or emergency blanket in multiple scenarios and conditions. Don't be afraid to get creative in the way that you use them and get good at setting them up.
I'm blessed to be able to spend A LOT of time in the field! Last year alone I logged close to 30 nights out and most of those were under some sort of tarp shelter. The type of tarp and setup depends greatly on the terrain, weather, purpose, and preference of pitch.
Example, in my 24 hour patrol kit my shelter system consists of a surplus army poncho, a paracord ridgeline kit, a few bungees, and a few tent pegs. It's just big enough for one person to get out of the weather, can be setup in a plow point configuration (as shown below), as a lean-to, or a simple A-frame, and can provide temporary camo if needed.
Now for a full shelter kit in my Long Range Patrol Bag I'm using either a 10x12 camo tarp or a 9x7 British Basha. This may be used as shelter and camo in a multi day OP/LP for myself and 1 other person. It can be pitched many ways such as a modified A-frame (see below) for a multi-day OP...
Or in a low flat lie for increased camo effectiveness or sun protection...
Adirondack style lean-to on a backpacking trip. This style can easily have the "porch" side dropped to the ground in case of inclement weather...
And for over a hammock the A-frame gives full coverage protection...
Another tarp pitch option for winter use or extreme weather is the tent pitch...
It's roomy enough for 2 people and their gear, gives about 300° of protection, can be fully sealed off with one's poncho, and is very sturdy in windy conditions.
Lastly in situations where camouflage is paramount, an Arcturus space blanket modified with camo netting makes for a great shelter and hide for an OP/LP. If the purpose of one's patrol is to observe an area without being detected this style setup can really work to one's advantage.
Regardless of your use, prioritize getting out and practicing and using your different tarp setups and find out what works best for you!
Yes that is made using my 10x12 tarp. Can be done with a 10x10 too. I use the stuff sack folded up on top of the center stick to protect the tarp.