Please contact your bank and let them know you will be traveling in Thailand and may be using both debit and credit cards. If your bank doesn't know, they may block access to your card while you are here. On this note, there's no need to bring large quantities of cash. There are plenty of ATMs and we will make stops for you to take out money. We suggest that each traveler allocates $100-200 for the entire trip.
Most places only accept cash (Thai Baht).
While you won't have to worry about tipping throughout the trip at meals, etc., we do encourage tips for our guides, and drivers. We recommend a range below, and this is per traveler. Feel free to allocate this and give at the end of the trip; no need to tip them at the end of each day.
Guide - $6-10 USD per day
Driver - $3-5 USD per day
In case a traveler would like to bring some donation to the kids at the school, we suggest something edible (just not chocolate), that is representative of their hometown. Alternatively, travelers can also purchase donation items in Thailand. That way supports the economy, it will be cheaper, and it saves space in luggage.