No babysitter at a wedding... what do you do?

We were hoping that our monitor may work if we put our baby down for bed... the wedding is at a small bed and breakfast type set up with the reception and all on the ground floor and closet by. The monitor isn't working tho.. so now I'm in the room and baby is asleep but I'm missing the wedding party :-/ would you have just gotten your little one to fall asleep in the stroller? That's what another mom said. Our little one gets super super fussy when he is overtired, it's not even possible really to enjoy ourselves if we keep him up. I guess the stroller would have been the way to go. 
I'm so happy at the next wedding we will have a babysitter...