Babysitter Needed for my Children

My son is 7 years old. He is autistic. I need someone that can take care of him. Event: wedding! Whoever we hire will be going with us to the event. They would have to be able to to come with us and help by watching our son while we participate in the wedding. He doesnt like loud sounds/ loud music, which there will be a lot of, so he will likely be set in another room at the venue where I will be checking in on him while also participating.