Personally, I think that every federal worker not being paid should immediately stop reporting to work. Every one of them. They should stay away until their jobs are funded through the remainder of the fiscal year and they are assured of being paid for all their unpaid work. This will cause chaos and hardship. So be it. The Trump administration has already foisted chaos upon us all for a useless vanity project. They created this mess and can make it go away any time they choose to do so. Force them to choose.
Here is one example of a consequence of a total walkout: Imagine the pressure that will be brought to bear on the White House when all commercial airline traffic stops due to the lack of air traffic controllers. The federal workers have the power to force an end, if they choose to exert it.