I carry a facemask all the time because in Illinois where I do a lot of my bike riding around Chicago area if you don't have a facemask you can't enter pretty much any store/ restaurant/ business. It gets more looney the closer you get to the city.
A lot of places close down their restrooms and even though they opened parks up, they keep restrooms in parks locked. So if I have to go the bathroom it's in the woods and I also keep toilet paper with me. I also during pandemic keep a roll of toilet paper in my backpack while riding and I have had to use it on multiple occasions because they got all the bathrooms locked and no one wants you using their restroom. Not good if you suffer from Irritable Bowel Syndrome. I also take a small bottle of hand sanitizer with me too.