Thanks for your answer wobble, and I appreciate your situation, but what about going an hour away for such an event to a congregation where you aren't known. Tell them you're traveling and have a new song book and NWT with you. How would they track you? Would they hold the numbers figure until they get confirmation from another congregation that you're an active Witness? They would most likely be glad that this anointed brother or sister was present and thought the event so important as to stop by the nearest KH to partake.
But for those still trapped int the Borganization perhaps it would be a good message to the Governing Body that there are "Awake & Conscious" Witnesses sitting in among others in the KHs all over who know Jesus is indeed their Mediator a are going to follow his command to "keep doing this in memory of me".
(Matthew 5:3) “Happy are those conscious of their spiritual need, since the kingdom of the heavens belongs to them."