Just west across Cardiff Bay is the Vale of Glamorgan, kicking off with Penarth, a laid-back beach town accessible from the city via Cardiff Bay Barrage. Here the countryside replaces the suburbs surprisingly quickly, giving way to sandy coastline and rolling inland hills full of ancient history. Historic Llantwit Major has tranquil camping nearby, some of which puts you in touch of lovely beaches like Dunraven Bay. You can also explore different options for camping near Cardiff on Hipcamp.