Headcanon time: Wendy works as a park ranger (and occasional investigator of forest crimes) for the Gravity Falls Valley and lives in a log cabin she built herself. Pacifica meanwhile returned to the Falls after a bad experience with a college work placement and took up her old job at Greasy's - word is Susan wants Paz to take over once she's retired. Since Dipper and Mabel are off doing their own things, the two have formed an odd friendship. They like to go on walks, throw axes, host dirt track races, get drunk, smoke pot, eat suspect mushrooms, and play video games (not necessarily in that order). Could be more than a friendship, depending on how you look at it...