My 12 yo son recently became dry at night. 30 days in a row is considered dry.
We dealt with night time wetting as no big deal. He simply wore Goodnights or pullups to bed and had/has a plastic cover on his matress (they make ones that are fabric covered, so they aren't so noisy). He learned early to make sure his bed was stripped in the morning if needed. I also showed him how to run a load of laundry so he could do it himself when he wanted to. I tried to give him as much control of the situation as possible, so he didn't feel so out of control.
Here are a couple links that have some good info: http://www.hargitthousefoundation.com/causes.htm
www.goodnights.com
Factors for us: allergies, over-tired, naturally deep sleeper, stress, excess evening water consumption, heredity (dad was a bed-wetter).
I never took him to a doctor for it since I know his dad wet the bed a long time also. I would have taken him if there were day time issues as well.
That being said, my cousin wet the bed and did need medical care/surgery.
I hope some of this helps.
Keep up the good work!