Chaperone on DD Field Trip

I was asked by her teacher to chaperon the field trip coming because my DD has a peanut allergy. Ok they are going to farm here in my area. And I don't think peanuts grow in my neck of the wood. Why in the heck they need her epipen on the trip?

They butt in too much with families life already, why they can't butt in now and administer it to her when needed. Which I doubt, unless some kid bring a peanut butter sandwich for lunch and shove some of it in my DD mouth.

I don't mind going but I don't have anyone to watch the 2 little one while I'm out with them. I can take them with me and drive myself there but I don't think that is consider as chaperon. Anyway, if they want me to come they should let me drive behind.