Babysitter Needed for my Children

We will be staying in the Presidio for a wedding in October, and are seeking a babysitter to be on standby at our hotel for the evening while we celebrate at the reception nearby. Once our kids are ready to leave the event (probably around 7-8) we'll walk them back to the hotel, ask the babysitter to get them ready for bed, put them down and sit in the hotel while they sleep and we finish up the reception. Our children are 7 and 4, good natured and easy going (though I'm sure the excitement of the evening may require some wind down!).