Do these public courses near Bangkok require advance bookings, and is walk-in play generally possible, or would you recommend reserving tee times ahead?

Public courses near Bangkok are usually accessible, but availability varies. Siam Country Club Old Course is public, while Alpine Golf and Sports Club is private but can allow public access through specific arrangements. Given popularity, it's safest to book tee times in advance, particularly on weekends, as walk-in chances may be limited.