C.T.
I think you have hit the nail on the head when you say she sleeps too soundly at home to wake up and use the bathroom. My daughter was the same way. Bedwetting tends to run in families. My father and brother were bedwetters too. Our decision was to use pull-ups to minimize the laundry and just wait until she outgrew it. I would put off sleepovers as long as possible, but our girl never had an accident at a friend's house. I think she just never fell into such a deep sleep anywhere but at home. Your daughter will very likely outgrow this soon, but it can linger until puberty. Our daughter wet the bed until she was nearly 12, but it's a distant memory now and she is/was happy and well adjusted in every way. I know it's hard, but this too shall pass.