we don’t know at the moment what the situation will be in December. You can join an ASQ review group. Actually some hotels do allow visits through glass - you can speak on the phone while seeing each other. So far no Udon ASQ but one may get added- there is one in Buriram. It looks likely that there will be some very limited tourism from October but you will probably have to quarantine on an island such as Phuket, possibly Koh Lanta, Samui etc; basically wait for actual government announcements before trying to book. Research your options though.