What's the etiquette for seating babies and children at wedding receptions?

[Lilliana]

We have babies and children of all ages coming to our buffet reception. One of our friends requested a high-seat for their child. We have no idea where to get these from and what about for other children. Also we heard parents would generally know to bring their own pram. Is that true?

What age to what age would need a pram (and would they bring their own)?

What age to what age would need a high chair (and what can we provide or ask them to bring)?

Thanks!