
Sarah B. answered 08/04/19
Former Writing Program Lecturer and Current Writing Consultant
I think your instinct is correct to try to avoid a "mid-story life dump." However, there's probably a good reason that there is so much back story that you now want to get onto paper at this point in your story. My advice would be to get all your ideas down on paper and then worry about where they will go - or even if you will use all of it. After you get everything down on paper, then you can make decisions about what to cut or move to other stages of the story.
If you do decide to use most or all of the back story that you are bringing in at this stage in the story, then you could certainly explore different formats to bring in the back story to keep readers interested. Perhaps a letter that the protagonist is writing to someone else, for example? The format will really depend a lot on your genre and the overall mood you want to create with your readers.
If you'd like to discuss further, I'm available for online tutoring.