The state part I agree with, but how do you mean the feds will step in? The federal government started calling people back last week to telework and this week those same people are on site. Next week even more come back to meet at minimum 25% of capacity, this is all branches. Right now the GSA is restructuring for announcement of full TOD on May 1st (although we'll see, a lot of people want to continue staying at home and getting paid, can't blame them there).
Given the return to duty preparations, growing organized protests and widespread saturation the federal government has shown they've folded their hand in anything but emergency support. That said, I haven't read anything about post-quarantine regulations, but it's looking like the only way the feds will be involved is through funding (no barricades, camps, searches, etc...). That surprises, as that means that the feds consider this to be too massive or not important enough, after all they do step in during natural disasters.
https://www.bloomberg.com/news/articles/2020-04-20/white-house-tells-federal-workers-to-prepare-to-return-to-office
Comically on other sites there is debate about the 10th Amendment or National Guard Vs. state police, however, that scenario is textbook revolution el grand (although some would argue that simultaneous high and petty treason rationalizes to a coup). None of that is going to happen over this.
