Blow off tubes for ALL primaries, airlocks for after the krausen falls or secondaries.
If there was a 10 commandments of brewing this would be 2nd after sanitize anything that touches your wort/beer post boil IMO.
I have NEVER had to clean up a giant mess, I have had to empty blowoff buckets.
“I'm not drunk, I'm from Wisconsin.”
We have been out drinking your state since 1848!