We laid out the center line and angles on a 2' x 4' piece of pegboard and put a bolt at the apex. We loop a piece of string about 100' long around the bolt.
Line up the front edge of the pegboard with the edge of the runway, send one guy out with the string while another lines it up with the guides on the board.
We use a line-painting cart when we can borrow one but usually just run a dotted line down the string by hand for our practice sessions.