Setting Infiltration Skills and DCs

Many of the sample infiltration activities and events give a DC range instead of a fixed DC. Set the DCs based on the standard DC of the party level using the table on Level-Based DCs, and adjust them using the DC Adjustments. When given a range of skills for an activity or event, you should vary the difficulty based on the needs of the story. For instance, if a PC is Scouting a Location, you might want to use a low DC for Stealth (because it's easier to scout when unnoticed), a hard one for Perception (because while the PC might see the enemy, the enemy might also see them), and a very hard DC for Society (because walking in like you belong is difficult if you don't have an invitation or the right uniform). This not only adds a certain degree of plausibility, but by planning for and allowing a broad range of skills as a means to complete the activity, you also become better prepared for when your players improvise.