@Darren ******
You also need a Health Certificate saying you are Covid-19 free within 72 hours of arrival. And pay ~$162 for testing after you arrive including 24 hour waiting with your group and 3 meals. If anyone in your group tests positive, then you are in for a 14 day guaranteen (What the $3000 Deposit is for).
I don't think the $3000 is scrapped but some reports are saying they are not asking for it. But you should have it ready.
Also, I hear they are not issuing new visas. So you can try the Cambodian Embassy but you may be out of luck. Pretty sure Visa on Arrival is suspended.
But good luck finding a flight in. And I believe All land crossing are only open to business traffic.