Erotic Survivor (2001)

Erotic Survivor is a voyeuristic game decided by wits, willpower and wild eroticism as two teams stranded in a remote tropical forest battle the elements and themselves to see who will come out on top and win the million dollar Grand Prize. For the all-girl team that quickly discovers it's made up of full-blooded, hot-bodied lesbians, you can be sure each of them will wind up "on top"? several times!

More info: IMDB