Children camping alone in garden - AIBU

[UserA]

A close friend has asked if my dc, aged 10, 12 & 13 would like to camp in her garden (socially distanced of course!) with her dc, both aged 11 - but alone, with the parents sleeping in the house. Apparently her dc have done it a few times over lockdown. I was fairly surprised and I don’t think I’d feel comfortable with mine sleeping outside alone. We both have fairly large gardens which aren’t particularly enclosed, as in not backing onto other houses as such. Recently there have been some sexual assaults/flashing episodes in the area, which makes me even more uneasy.. dc obviously annoyed that I haven’t agreed! So, AIBU - would you agree to them camping out alone?

After reading about the Sophie Hook case, no. I wish I could unread what I read.
When I was little, I lived in a small town where everyone knew everyone and it was very safe. I know a lot of neighbors but not all, and who knows if the ones I know are pedophiles or murderers?
I am very paranoid about all men and basically suspect anyone that is not my DH of being a sociopath or pedophile.
I think it's a very difficult area to navigate independence when the kids are above 10. My oldest DC is 4 and I am happy she's small enough still that I can control her life and keep her safe.. I dread the day she starts needing independence.