Camping in the rain

Before Dan goes away to work for the summer at the end of next week, she's planning on going to Cornwall camping tomorrow for 4 days with her best friends from Sheffield. What with the current weather situation, and more rain promised for the weekend (what? more rain? you're having a laugh!) ) I'm a bit concerned that at worst they will drown.. and at best they will be wet through all weekend. She doesn't seem at all put off though. Oh the follies of youth!