How much is the Full Moon Party on Koh Phangan once you add up everything around it?

The entry fee is the part everyone quotes and the part that matters least. The boat over, the accommodation markup on party nights, and getting back afterwards are where the budget actually goes. One thing we will state plainly because it is sourced rather than folklore: drink spiking and drug arrests are a documented risk at events like this, and the consequences in Thailand are severe. The sourced version is here: https://meetlocale.com/guides/is-thailand-safe-to-travel-alone What was your genuine all-in total for that night, counting the bed and the boat?