I have never had a reaction to the yearly flu shot but cannot say that for the covid vaccine. The first shot was uneventful, second shot my arm was pretty sore - mild flu-like symptoms, the day after the third shot I really did not feel well - had a fever, stayed in bed most of the day. So I have only had a total of 3 covid vaccines. I am leary of getting any more covid vaccines. Have not thought about RSV.
At some point you have to live your life. Find the best rated masks for traveling especially for use in congested or confined areas like restrooms. Sounds like thoughtful pre planning is in your favor.
suzanne