Raw and JPEG

Hi,

I normally shoot in JPEG (D100, D200). Now with the new D700, I want to get into shooting RAW. But I am a bit nervous as both the D700 and Lightroom 2 are new to me. I am heading to LV and LA tomorrow for a family vacation. I am thinking about RAW+JPEG(Normal) or RAW+JPEG(Fine). I am a bit nervous shooting with RAW alone.

Thanks
Quang