Ok it's no mystery to anyone that the writing for Family Guy has become incredibly weak in later seasons. This is basically just another example. This show has a bad habit of introducing new characters that are just suddenly supposed to be essential to the main characters because they never knew this person existed before the episode. They did this with Brian's son, Lois's brother, Peter's REAL father, Peter's sister, Peter's many children, Quagmire's infant daughter, and now his new character. It's too many times.
When an episode can't focus on one storyline, it's complete garbage. That's basically what happened here. The plot started by focusing on the guys honing in on party bus events. Then it transitioned from that to Quagmire trying to be a father to his daughter that he tried to sleep with (or already slept with. It wasn't really clear). They had his daughter performing at a gymnastics event which I thought was going to be the focus of the episode but no. It randomly ended by Quagmire and Peter taking their daughters to a camping event.