I carry EpiPen Jrs wherever I go. I have two EpiPens on me as I write this. I carry extras so that, should Charlie go off with someone else (like a grandparent), I can send two with him and have two with me. Why do I need them when I’m not with him (aside from my own adult EpiPens, which I carry for my own allergies to bees and shellfish)? Because I’ll never not be ready. I’ll never be relying on someone else to have the medicine he needs to stay alive.
I think many parents don’t see things the way I do, as evidenced by this post: Wake Up Call to the Food Allergy Community.