Opening night draws the people who came specifically for the scare and almost none of the casual crowd — the park feels different when everyone in it chose to be there. Knott's Scary Farm invented the Southern California Halloween experience, and over 50 years of iteration on the same park footprint has produced a version that knows exactly what it is doing.
The mazes get annual updates, and some have been running in evolved form for decades, refined by people who have done nothing but this for half a century. Buena Park puts it 35 minutes from downtown LA and 45 from central San Diego on a clear night. Opening nights pull the most committed fans and the lightest crowds — which is the best possible combination for anyone who takes the scare seriously. Send it to the friend who does Halloween all month long.