Doesn't matter what the situation is, do not go to Poi Pet or you'll most likely be denied entry back into Thailand and find yourself traveling to the airport to fly back. Pick a different border or fly somewhere else and back.
they will not excuse the charge. There is a built-in 7 day grace period. If you failed to report you failed to report. 7 days more than makes up for weekends and holidays. There's no additional time granted for 90 day reports.
Just go on your holiday and then it's a
*****
chance they ever even notice you missed your report.
this year's requirement is 800,000 for 2 months before the the extension and 800,000 for 3 months after, then the balance can never drop below 400,000. Those requirements must be maintained or technically the extension is invalid as of the moment the bank account drops below the required balance since those are requirements of the the current extension. If they were to withdraw all the money, when they check the 12 month bank statement to verify they met the requirements for the previous year, they would deny the next extension for failing to meet the previous extension requirements.
The fact that you have a DTV means absolutely nothing. Your obligation is the same as everyone else and there isn't anything special about DTV. The officers at the airport have nothing to do with 90 day reporting and won't care leaving or entering Thailand. It's only at an immigration office that they might notice you missed reporting and fine you.
well now your life is easy. The fine is the same whether you're 8 days late or 8 months late. So you don't have to think about 90-day report again until next time you're already going to immigration for something else. Just pay the fine at that time, as there's absolutely zero reason to go to immigration just to pay a fine. And if it saves you from another report or two in the meantime, it's an added bonus.