Tropicalevo

Asian elephant will eat 150 kilograms and drink 40 litres of water . (With thanks to DuckDuckGo)

It is not just elephant camps. All over Thailand there are also rescue centres. These people try and rescue (buy - 40-50,000 baht) the elephants and then look after them. They too are struggling with there being zero tourists. However, donations to these centres do go to the elephants. I have been to the local one here and have donated and seen where the money goes. Just donate to ones in your local area. There will be one somewhere. https://samuielephanthaven.org/rescued-elephants/