Thanks to the BBC I think I figured out my problem.
http://www.bbc.co.uk/news/science-environment-23530408
http://www.bbc.co.uk/news/science-environment-23530408
What surprised the scientific team was the increase in the amount of sunlight the volunteers experienced through their camping experience, around 400% more than they were normally exposed to.
Quote from the article:
In their next study, scientists discover that those who camp regularly have a higher rate of skin cancer than those who do not.
You're screwed either way...