In a fanfiction, perhaps the Flight Camp is in trouble and they need the help of someone from the Muggle world, which is where the Dursleys come in. The Dursleys initially resist but then Harry shows them how important it is. And along the way, they learn more about Harry's world and become more accepting. This could be a story of growth for the Dursleys.
There could be a fanfiction where a new character in the Flight Camp has a connection to the Dursleys. This character could be a long - lost relative or someone who knew the Dursleys in the past. This connection then leads to a series of events that involve Harry and his relationship with the Dursleys and his experiences at the Flight Camp.
One idea could be exploring how the Dursleys react when Harry starts to show signs of magic before he even goes to Hogwarts. Maybe he accidentally makes Dudley float during a family dinner.
In some fanfictions, the Dursleys might be portrayed as having a change of heart. For example, they could start to secretly admire Harry's magical abilities instead of resenting them. This can add an interesting twist to the original story.
Well, it could be about a young wizard who is not very confident in flying but is forced to attend the flight camp. There, he meets a group of misfits, and together they discover a secret about the flying brooms that could change the way they view Quidditch forever.
Another plot could be a time - travel scenario. Harry goes back in time and tries to understand his early years with the Dursleys better. He might try to change some of the negative interactions and make them more positive, like showing Dudley that there's more to life than bullying.
One prank could be Harry using magic to make all of Dudley's clothes two sizes too small overnight. Another might be making the Dursleys' living room furniture float whenever they try to sit down. And he could also use magic to make the food on their table turn into slugs when they're about to eat.
In certain fanfictions of this type, Harry could be found by a powerful but reclusive wizard. This wizard decides to mentor Harry in the ways of ancient and lost magics. Harry then uses this knowledge to not only become a very powerful wizard but also to change the wizarding world's view on things like blood purity. He may also go on a journey to find out why the Dursleys abandoned him and in the process, uncover some dark secrets about his family that had been long buried.
One interesting Dursleys fanfiction could be about Dudley's life after learning the truth about the wizarding world. Maybe he starts to have a change of heart and tries to make amends for how he treated Harry over the years.
It could be a new student who has just received their Hogwarts letter. They are excited about the flight camp as they have always dreamed of flying. This character could bring a fresh perspective to the magical world of flying at Hogwarts.
Well, there might be a storyline where the characters at the Harry Potter camp have to compete in a special magical tournament. This tournament could involve tasks like flying on brooms through a dangerous maze in the forest near the camp, or solving complex magical riddles. It would be a great way to show the different skills and personalities of the characters. Also, there could be a story where a group of students form an alliance to fight against a dark magic that's starting to seep into the camp, like a shadowy presence that's making the magical plants wither.