Got off the phone a little while ago with a very helpful State Employee at the Wildlife Heritage Office. He did some checking with the NPS regarding river access and called me back with the following.
The access points that the NPS controls (Violet's, Pennyfield, Edward's, etc.) are closed. Not good for the trailer crowd. Technically, trespass on Park property is not allowed. Of course, neither is jogging, biking or anything else on the tow-path and reportedly there's a lot of that going on, especially downtown.
The good news: Riley's is MCPPC property and remains unaffected. Also, White's Ferry is a private facility and remains in operation.
DISCLAIMER: This is what I heard, not necessarily what he said.
Good luck everybody. My thoughts will be out there with you.