Okay, this is a tough one. I have a 15 year old daughter with some experience riding but not a lot. We love to go to the sand dunes near Yuma, Arizona couple times a year. And we ride desert trails near home. Any suggestions for a bike for her that could do both? Am thinking about something like CRF 150R? A friend has an XR200 but don't think that would do sand too well. Thanks in advance for any help.