Why not drive down to Koh Chang, there is a lot less restrictions driving. I just drove up from Phuket to Bangkok apart from exiting Phuket there were no stops.
Not sure where you are is Isarn but we did a great road trip couple of years ago, drove full length of Sukhimvit till cambodian border and then drove on Thai side of border around to Udon found some amazing places on the way.
Koh Phayam off Ranong is also very nice and very quiet at the moment.
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@Bobby *******
said biggest restrictions maybe returning home.
I had 8 ART self tests kits with me as I had no idea if we would get stopped at any province borders and could do a test there and then if required.
There is going to be a big promotion for domestic tourism not sure of plans yet, they were going to have 3 big free concerts in Phuket, Phang Nga and Krabi province but that got stopped.