Why pack even a traditional canvas tarp? Lightweight cotton tents date at least from the nineteenth century so must be thought of as traditional. But why carry anything like that at all if you are able to make or find a natural shelter? Surely the ultimate in traditional. Or just a bivvy bag which is as old as you like to go back in time, try a cloak which can be very pleasant. If able use fire more than coverings as has been done for many thousands of years. Should be a term for all these traditional ways, bushcraft?