I have a 5yo son and 7yo daughter. they’re total sweethearts and have loved every sitter they’ve had. My son does have autism, but he has low support needs. You just need to pay extra attention that he doesn’t get out of any unlocked doors.
Typically just watch TV and hang out. Maybe get them some juice or snacks.
Generally just for the evening. We do have a dog, but she is quite friendly and I can put her in the basement if you don’t want to interact with her.