@Scubbie each encounter is bespoke to the Quest its related to. Sometimes it's a puzzle to open the entrance. Sometimes it's a combat encounter where the adventurers have to storm the entrance and overcome guards. Sometimes it's a stealth mission where they have to remove guard without being spotted or the alarm being triggered.
@Tfmonkey I thought you mentioned doing an entrance random encounter table
@Scubbie that's separate. The random encounters are optional in between things. The infiltrations are optional introductory things.
@Tfmonkey Are you adding guard towers or Golems outside of the quest entrance?