How do you get on with your mum? is it a possibility? or a sister? Or even a really close friend. With a friend or sister you could explain to them that you would rather them stay away from you unless DD needs them. That you only want it to be the three of you & she is only there if needed.
It would be pretty hard if you don't have someone else there.

I would love to have DD1 in there. At 6 I think she is mature enough to handle it & would really enjoy the experience. I didn't think about it before though. DD2 would be impossible. She would not be able to handle me in pain & would freak out. Too young to understand. I wish I'd thought of it now. I think it would have been unreal to have her there. She handles things like that really well.
Oh wel. A bit late now. Good luck.