It should cover the whole tent floor for better, drier storage inside the tent. Wooden tent pegs are light, cheap and easy to replace. Uprights and ridge poles can be made from any reasonably straight branches and they should be peeled. They should be no heavier than necessary. It's easier to use straight uprights and lash the ridgepole in place.
Forked uprights are hard do find and tend to split.
For those who can't sleep on straw, or get to events after its gone, backpack or self-inflating mattresses or layers of carpet padding can be covered by an old sheet sewn into a bag. This, on a ground cloth, with two or three blankets will be warm enough in most weather. Another often overlooked item is a travel toilet kit with a personal selection of items like soap, shampoo, toothpaste and brush, contact lens gear, spare glasses, allergy medicine, prescriptions, aspirin, toilet paper in a water tight pouch, and other items. It should be small enough to hide in a haversack or small bag. Things to avoid include chairs and bed frames.