Just an update on Chiang Khong. I just came back through. This was my 3rd land entry this calendar year. And second Chiang Khong crossing in a row. Last one was 30 days. This was 60.
It's now 1 night instead of 2. Laos still took 2000 THB for the VOA.
Thai immigration gave a document showing requirements to come back the next day.
10,000 THB, outbound flight to country of origin, and proof of accommodation in Thailand for duration of stay.
They didn't ask to see the 10k baht on the way back in. But he did take 5 minutes examining the plane ticket screenshot and was on his computer verifying it's legitimacy.
I showed my TM30 as proof of stay. He didn't pay much attention to it.
Make sure you have your plane ticket.