Hey there! Just a heads up, if you're planning to catch some waves in the Mentawai Islands, there's a surf tax you'll need to take care of. It's mandatory for all foreign surfers and costs 2 million IDR (around 150 USD).
This fee covers you for 15 days, and if you're staying longer, you can extend it by paying again.
Remember, this tax isn't included in your package, so make sure to have it sorted before hitting the waves in Mentawai!