Look at the current maps showing cases,
NBCor one showing more specific locations
NYTIf there are no cases in the area where you are. then it's pretty safe to go purchase whatever you need now.
We both have underlying issues in my home that would put us in the at risk groups, so I have stocked up on items which have good shelf life. We live remote, and carry enough basic cold and flu type meds (constant sinus problems) to get by for a month.
For rv'ers you have the ability to isolate pretty easily, use of park facilities for W&E make many folks able to function for weeks. This time of year parks are thinning of snowbirds and those just outside the snowbird areas are reopening, many will likely have low use due to health concerns, so take advantage of them.
Boondockers, your tanks are your limit. Use them to your best advantage. If I were concerned that I was in an "at risk" group and full timed, I think I would locate somewhere which at least currently is a no or low case area. Stock up on what I could. Select an area which would allow me to isolate as much as practicable, but still be within 10 or 20 miles of a sufficiently large town to have a good healthcare option. Otherwise, I dont really think your any more susceptable than most folks in any small town. Enjoy the aspects of your travels that dont directly go against the obvious best practises.
You have rubber gloves for handling your stinky slinky, use them when you handle the fuel pumps. Use sanitizer for handling water hoses and spigots, use common sense. and go enjoy that the remote areas may not be as crowded as normal.