spinoff- for those of you not having children at the wedding

We have alot of younger family members, which at first I was considering inviting just first cousin kids only. But, I then went to a wedding where there were infants, strollers, kids rolling around on the dance floor. We do have kids in the bridal party that we are close to, but there is one child in my bridal party that I am worried about running around- but hopefully the mother will be on top of the child.
At this point, I wish we only asked our two nieces because it has become a bigger headache than it is worth!