I know this was directed at the OP, but I wanted to comment anyway. At the parish where we had our children baptised, they only allowed two children at a time to be baptised during a mass, so if you didn’t plan ahead far enough, you’d be waiting a REALLY long time. The other option was to have your child baptised “assembly line” style with a bunch of other families who you would never see again. The ceremony tended toward irreverence, since many of the families were unfamiliar with protocol, having not been inside a church since the wedding of the infant’s parents. The third choice, which some familes opted for, was a private ceremony which, while more intimate, at least allowed for due reverence to the sacrament.
While I agree that receiving the sacrament during a Mass is by far the preferred method (for me, anyway) there are good reasons not to.