When I first got to college, I wasn't used to things being as mono-chrome (or, really, di-chromatic, but I believe only 5% of students were black in the mid-2000s) as they were there because where I grew up was really diverse. But I don't think Clemson is unique in that regard.
I don't think I ever personally encountered any overt racism. The only things I thought were awkward were walking through the crowd of people tailgating for the Hank Jr. concert my freshman year before the UGa game with my black friend and there being Confederate battle flags all over the place, and then at basketball games people would get all excited for the white walk-ons but not the black ones. I was told second hand that a guy on the baseball team who went on to play in the pros stopped seeing a girl I knew because he didn't like that she had slept with a black guy on the team (who also went on to play in the pros). The way it was told to me, he was less upset that she slept with somebody else than that he was black. He was from Wisconsin, though.I was also told second hand that one of the sororities would immediately take anybody "ethnic" out of consideration during rush. To be honest, though, she was just really promiscuous.