@Daniel ********
Nice. Good for you.
Remember to print your
Thailand pass
PCR test,
medical insurance, with the word 50'000 next to covid 19
sha extra + hotel booking with prepaid airport transfer and PCR tests.
At Thai immigration they asked to see a hotel reservations for where I was staying after the Sha extra + hotel. I have never been asked for this before. I quickly booked a hotel on booking.com that didn't need a credit card and had free cancellation. I cancelled it as soon as I cleared immigration. The guy behind me said he was staying at a friend's house and they let him in, so maybe I'm not a smooth enough talker.
I left from Vietnam, so this might not apply to you, but they also asked me to book a flight out of Thailand before letting me check in in Vietnam. I used a dummy ticket and it only cost $5 and was accepted.
All the Sha extra + hotel people are waiting on the other side of immigration all day and they take people in batches. You don't need to worry about them not being there.