I'm not entirely sure what specific 'bunkd naked fanfic' is, but if it involves inappropriate or sexual content, it's not acceptable. Fanfiction should generally follow ethical and moral guidelines.
Xander is a great character to feature. He's always full of energy and getting into fun adventures, which can make for an exciting story. Also, Emma, as she's often the voice of reason among the campers and can bring a sense of stability to the plot. And Lou, the counselor, is another good choice as she has to deal with all the camper's antics.
One popular idea could be a new camper arriving at the camp and having to deal with the existing cliques. Another could be a mystery adventure that the campers go on within the campgrounds, like finding a hidden treasure. And a third idea might be a camper getting into a friendly competition with another over who can complete all the camp activities first.
There really shouldn't be any positive aspects. Fanfic is meant to enhance and build on the original work in a positive way. If it has 'naked' in the description, it's likely to be inappropriate and violate the boundaries of acceptable fan - made content. It could also make the original work look bad and make other fans uncomfortable.
There could be a fanfic where a new camper arrives at Bunkd. He's gay and he meets another camper who has been a bit of an outcast. They bond over their shared love for art and music at the bunkd, and their relationship blossoms from there. They face some challenges from other campers who don't understand at first, but in the end, their love prevails.
You can start by searching on fanfic websites. Look for tags related to 'gay' and 'Bunkd'. Some popular fanfic platforms have a good collection of such stories. Also, you can join fan communities dedicated to Bunkd and ask for recommendations there.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.