More context is needed - as a sentence it looks incomplete. Are "we" [went about] hiding what : ourselves? or something else? or hiding from something?
About • preposition & adverb
1 on the subject of; concerning. If you were to go and see someone about something called a "hiding", then "We went [about the hiding]" - we went to find out more concerning the "hiding"
2 used to indicate movement within a particular area or location in a particular place. At Easter, little eggs are hidden for children to find. Here you would say "We [went about] hiding the Easter eggs for the children to find" - we moved all over the house/garden to hide the eggs
Student or Learner