*Just to answer some of the other questions raised:
- DD is a good sleeper, would be in a travel cot that she can't get out of.
- DH is even more paranoid than I am and is unlikely to agree to leaving her anyway.
- The wedding hotel is a small one which has been booked out in total for the wedding.
- Hadn't really thought about it until booking the holiday hotel which made a big deal about being child-friendly while still giving you 'adult' time by using their listening service with dedicated member of staff on duty.
Thanks again for helping to clarify things for me, I will follow my gut instinct and either keep her with me or leave early.*
here the op updated on p5, clarifying that at the wedding the hotel is small, and has been booked out in total for the wedding, so depending on the layout of the hotel and where the room was in relation to where i would be etc i may do it with a baby moniter/listening service, probably a moniter and as for not being able to hear it, mine is only a basic moniter but it has lights that activate when there is any noise.
actually at my cousins wedding last yr i did this dd was 6mths and ds4 was 3, i settled them to bed, made sure they were asleep and then went down to the reception with baby moniter, my mum, my dad and myself took it int turns to go up and check and i had the moniter with me, was literally a minute or two away up a flight of stairs.
the op also says that there is a 'dedicated member of staff on duty' so i would assume that is someone whose sole job is 'listening service' still not sure i would use it or if i did i would want the back up my moniter and again it would depend on the layout of the hotel, how far away i would be from the room that the children were sleeping in.
i think its a need to see the situation to judge tbh, there are def some hotels i wouldnt do it, but others i would with a moniter and if the room was close enough for me to get too quickly.
i also think there is a huge amount of hysteria on this thread, and what solidgoldbrass said many pages back.