Is the following plan possible given the latest regulations? At what points will I need to provide proof of onward travel, and can I do that without booking any additional flights besides my final one? (I'm a US passport holder. I've always left Thailand within 30 days so never needed to deal with this stuff.)
End of Sep • apply for 60-day visa in Hanoi, having booked a flight out of Thailand on 19 Feb
24 Oct • arrive in CM from Danang with 60-day visa
21 Dec • do Mae Sai visa run by bicycle (as part of a Chiang Rai / Doi Angkhang loop)
[members only]
mid-January • get a 30-day extension at immigration
19 Feb • leave Thailand by air