https://www.reuters.com/article/thai...-idINKCN2AW12K

The hotel quarantine plan is expected to start in April or May in the provinces of Phuket, Krabi, Surat Thani, Chonburi and Chiang Mai, Minister Phiphat Ratchakitprakarn told reporters after meeting with tourism operators and health officials.

“Why these provinces? They are popular among tourists who usually stay for quite a long time, for one to three months,” he said.

Tourists would be quarantined for two weeks but if they test negative after three days they will be allowed out of their rooms in the hotel area
Well, that doesn't sound too bad then...