The fields I now fly at are very long and the pilots can't always hear a yell. At my old fields in Ca. the pattern flown was dictated by the wind direction, if you took off into the wind from right to left then the flying pattern was always going to be clock wise!! Because the places I fly at now are not ruled by a club it can be a mess when you have more then one pilot in the air, it can be a real problem, no safty officer or club rules so you are on your own.