Would you be happy if your baby-sitter spent the evening at the party next door?
Would you be happy if your day-care nursery left your sleeping child inside without any staff while they took other kids outside for a bit of sunshine?
Can you guarantee your baby won't get a fever/choke/get bitten by a mossie etc?
Obviously your choice, but I wonder what the law is in Britain about leaving a child unattended in a house...?
Why not take them with you in a buggy?
Or get a local babysitter? - if you don't trust a babysitter are you worried that they won't look after them properly? - they could act more quickly and call you faster than the monitor system!
If going out is an important part of your holiday, and you don't want to take them with you perhaps taking someone on holiday with you would be a solution? Go with other parents, or grandparents?
Enjoy your holiday, but when you are weighing up the facts to decide what to do please thinking of the 'what ifs'...
What if you don't go out?
What if you take them in a buggy?
What if (Heaven forbid)something happened to your child while you were out?
What if there was a fire etc? You would not be allowed to enter the hotel to rescue your child, and have to make the people in charge of the emergency that there is a child who is not going to be able to react to the emergency or take any measures that adults would - eg wet towel at the bottom of the door to stop smoke, going to nearest fire exit, or come to that setting off the alarm in the first place if the fire starts in your room!
It must be infuriating not to be able to behave like a childless couple when you need a break, but you really don't have long as a parent of young children...