Bridgette & Courtney - surprised no one mentioned that one.
Gwen & Geoff - The two bond later on
Duncan & Leshawna - Ditto
Courtney & Leshawna - The two seemed to be close enough for Courtney to reveal something about Duncan.
Izzy & Owen - They seem to make up somewhat, although they'd hardly be a couple
Gwen & Leshawna - Rather obvious
Of course, most campers get along when they have common goals, like being angry at Noah.