I wet the bed until I was 16 years old. My mother put me through everything to try and help, but for the most part it only made things worse. I took different kinds of pills, used a nostril spray. I was woken up frequently, not allowed to drink after a certain time, all all it did was make the problem worse for me. When I was younger instead of going through the embarrassment of telling my mom, I would hide it from her. I would sleep on top of towels, or pull my comforter over the spot until she decided to do laundry. I also wet the bed at a couple of sleepovers, and surprisingly it wasn't a big deal. If you tell the mother of the problem, it won't come as a sopping wet surprise the next morning. This is a genetic thing, it happened to my mother, and I fully expect it to happen to my son. The best advice I could give you is to invest in the quilted pads they use in hospitals, you can purchase them at any medical supply store and it's extremely inexpensive compared to other venues. It absorbs all wetness, and is much easier to wash. I went to every single doctor, and the only thing I got out of the entire ordeal was more stress. It became overbearing, and pretty soon that's all I could ever think of. I was also told, that the stress that was put on me was probably why it lasted for so long. Make sure she understands that it's okay, and you two would probably be surprised at how many other children do it. My life long friend and I disclosed our secret to each other in the 4th grade, from then on she was my new favorite sleepover companion!
Good luck with whatever avenue you choose, make sure this isn't something your daughter is going to get upset about, because it makes the whole situation more difficult for everyone!