The Beginning of the End

Takes place after "Gideon Rises". For the last few weeks, Bill has pestered Dipper about some plan of his, only missing two things: "Glasses" and "Llama". Meanwhile, the Flynn-Fletchers and Nicole Bonabel have won a trip to Gravity Falls, while Nicole gets weird dreams about a triangle and "Pine Tree". Is it a coincidence? Or is something more at play? Rated for later chapters.