As everyone makes their decisions, please remember that those who decide to travel increase the risk of infection for everyone they come in contact with - both at the destination and at their home when they return. While you may not be at risk or personally suffer serious consequences, those who come in contact with you could. This contact, even though unnoticed and unintended, can be deadly for the more vulnerable among us.
The purpose of all the closings is to slow the community spread of the virus so that our health care systems do not get overwhelmed with seriously ill people. If enough people decide not to follow CDC guidelines, it won't surprise me if even more drastic policies are put into place, including a ban on all travel via airplane, bus &/or train.