DOUBLE BOGEY,
Lets be clear, airspace IS open - VFR flight is perfectly legal, although caution is advised (rightly so). Look at the NOTAM.
It is only IFR, and therefore Class A, which is unavailable. The vast majority of helicopter flying is outside Class A, and that which is flown normally IFR can, if VMC pertain, be flown VFR.
You could rock up to work on Monday, with EXACTLY the same NOTAM in force that their is today and your company may ask and expect you to fly.
Regarding charter, from what I hear, demand has never been higher as all those stuck and with sufficient money are chartering helicopters!