Eating In: Epi Pen

Play Date and Allergies?

My daughter is 6 years old, has a tree nut allergy and starting to embrace the "play date." She has an epi-pen, and knows how to use it. How do you all handle play dates? When do you share that she has an allergy, before date set up or the day of? Do you assume the host parents need educated on how to use an epi-pen? I am very comfortable with the situation, but I know others may not be as comfortable. I don't want to scare people off from her inviting her, but I also want her to be safe. Any ideas or suggestions, or stories of what has...