Best advise could be if you are currently camping and in a campground think about staying there until further notice. minimize interstate travel.
As campgrounds across the US take precautions to minimize exposure.
I doubt campgrounds will open in northern states for the 2020 season.
Situation in States is changing by the day not week.
Current WHO data
“It took 67 days from the first reported case to reach the first 100,000 cases, 11 days for the second 100,000 and just four days for the third 100,000,"
No panic, minimize risk, stay safe.