Looking for a book, but can’t remember the title…

This might be a long shot because it was so long ago, but I’m looking for a book that my therapist had me read years ago, when I was coming to terms with being queer. I think it was a pretty old book, from either the 90s or 2000s. I believe all or most of the characters were some type of LGBTQ, and I think they were at some sort of summer camp? I remember that there was definitely a gay cis man, and also a trans man in the book. Does anyone know what book this could be? Thank you!!