^If PB ever decides to go to PG, then I wouldn't advise her to explore the hills. Just White Beach or Sabang Beach. Or chill at Badladz in Muelle Pier. Why would she want to go to the hills? Even I wouldn't want to go there.
As to the South, the area that is referred to is Mindanao island. That's the South - majorly Muslim area. Mindanao is in a state of Martial Law now, because of the fighting in Marawi city. I wouldn't advise anyone to go there, and am aware of the travel advisories by embassies.
As to Bohol, Cebu, Dumaguete - the islands PB referred to, these are not considered as South. They are in the Visayas region, which is considered as Central Phils. There's even a uni, Central Visayas State Uni. See a map.