My husband and I will be arriving in Munich around on May Day (Wednesday, May 1, 2019) and departing on May 2 in the afternoon for Salzburg. We would like to visit the Marienplatz and St. Peter's Church on the afternoon of May 1 and then check out the Hofbrauhaus that evening. We plan to visit Dachau on the morning of May 2nd before heading to Salzburg.
Are these very 'touristy' locations going to be difficult to visit/enjoy with it being May 1? Also, will travel in Munich be congested due to the extra visitors? We really don't have a lot of leeway in our schedule, but we really want to visit these places.