FYI, the park gate is closed for the winter, so now you have to start on hole 5.
I know what you mean, but technically, you can still start anywhere you want. If someone wants to walk down and start on hole#1 they are very much still free to do so. We have in the past.
From a matter of convenience,
since the gate is locked, it is preferable to begin play on either hole#5 or hole#6. We have done both in the past.