PC Preparations
Typically, you'll limit the preparation phase in some way, such as by setting a number of days the PCs have to prepare and by constraining how many preparation activities are available to make sure the PCs aren't entering the infiltration with so many Edge Points that the infiltration is no longer suspenseful. The more opportunities for Edge Points you give, the lower you should set the Awareness Point thresholds for complications and failure. Also decide how many times the characters can benefit from each preparation activity—most activities should grant their benefits only once.
You can use the activities below for your infiltration by adjusting the details, but you should also create custom activities that link directly to your story.