What's a good sunscreen that helps you tan while it protects?

I'm about to go on a camping trip with my school, and we're going to be staying at a campground near a lake, where we will go to and swim, play, all the usual. Anyways, I'm half Italian and a quarter Irish and a quarter French. I took after the Italian side (mom's family is from Sicily), so therefore I have an olive complexion. I was wondering what would be a good sunscreen that will protect me, and isn't really greasy, and also allow me to get a nice tan? Thank you :)