This is what worked for us with our daughter, though each child is different.
Anyway, we bought two bed covers (twin size):
http://www.amazon.com/s/ref=nb_ss_ba/104-###-###-####-###...
It lays over the sheets, so if they have an accident, the only thing that gets wet is the cover. It's easy to pull off and wash and lay the clean one down. We also had a set of new pj's and underwear laid out so they would be easy to put on. We never did use pull-ups (actually think they cause more problems than help!).
We also took her potty chair and sat it next to her bed. We explained everything to her before hand in a very positive way. It was interesting to see that she had no instinct to wake up to pee. It makes sense considering she had always worn diapers and there was no reason to wake up and pee.
About 2-3 hours after she went to bed, we would go in and wake her up, sit her on the potty. She would go and we'd lay her back down. Sometimes it was clear she didn't actually even wake up. We always did it 2-3 hours after she went to bed and then sometimes we would do it again during the night. But that is a decision you'd have to make depending on whether she wets the bed again through out the night. We tried to time it to see what was normal for her body. If she would've wet the bed around 4am as well, we would start getting her up at 3:30-3:45am to have her go. You would only need to do this for as long as it takes to get her body used to waking up on it's own at that time. For our daughter, it seemed to take 2-3 weeks of consistent waking up to get her body to adjust to waking up for it. Once she finally started waking up on her own, we didn't have to do anything else. We still have the potty next to her bed because it's an easy way for her to go.
I highly suggest no pull-ups. Even if she is wetting the bed every night. The bed covers were GREAT. Also, make sure to never respond negatively to her or get upset at her. We would say something like, "Oh yucky. You got pee all over you. Next time if you need to go, we have this potty chair right here for you to use so you don't get wet." So we acknowledged it was gross for her, but we didn't get upset at her.
My niece is 11 years old and wears diapers to bed. Some children are older than others. Also, it is something my sister has a hard time being patient about, so she has done what she needs to do in order to keep the peace. Whatever works for you, you should do.
Hope this helps some! It worked great for us, but each child responds differently.