Formats
Both formats work. The difference is what you are trying to achieve and how much time your group can realistically give.
Best when:
Half-days slot cleanly into MICE schedules and work well in Bangkok hotels or as a focused session in Chiang Mai.
Best when:
A full day gives room for outdoor challenges, longer problem-solving blocks and a closing conversation that actually lands.
Multi-day retreats make sense when people are travelling internationally or when the goal is culture reset rather than a single activity. That is the territory of the full Thailand retreat format.
If you are unsure, start with the goal and the available time. The format usually becomes obvious from there.