Mild Mono?? When to Regain Activity??

My 16-year old daughter was diagnosed with mono. She had no symptoms other than a severe headache and a fever for a few hours. The doctor knew from blood tests that she had a viral infection, so I asked about the possibility of mono. The mono test was positive. Her glands, including spleen were never enlarged. After a week, she has slept as much as she says she can. She is to leave on monday for an intensive dance experience. I am still trying to decide if she should go. The doctor saw her on thursday afternoon and said as long as she rested when tired, she should be okay. I'm looking for info on anyone who has mild mono and what to expect. Is there even such a thing as a mild case?