Like everyone else says, lots of seating, shelter from weather, whether too hot or too cold or raining, plenty of food.
If there is a quieter place to sit out from the noise all the better. I have been pregnant at weddings, obviously not at the time they are booked but later so it isn't just older people who need a seat.
One of the worst weddings I went to took place in a Michelin star venue, not enough seating, a couple of canapes to last us hours and finally, finally the main 3 course meal. But everyone was still hungry afterwards. It looked pretty, tasted really good but there wasn't enough on the plates. There was nowhere to get food nearby, everyone had been drinking so we couldn't drive anywhere and we ended up raiding our boot for the snacks we had stashed for our journey there and back. We were not alone in doing this.
Yours sounds like a good amount of food though. Mmm cheese.
make sure you have a good selection of soft drinks, cater for children too.
I would hate a glitter bar, sorry, and I wouldn't want anyone glittered people near me and whatever I had chosen to wear that day. Glitter bars are surely for festivals not weddings. I love glitter but it is an arse to get out of clothes.