Small woodland venue ideas needed please (devon or somerset area)

Hi, can anyone suggest a venue in devon or somerset that offers legal outdoor ceremonies please, we would love to legally get married in the woods amongst nature without a reception after (we'd rather slip away by ourselves) , maybe just a drink or something small and short , most i've seen are non legal ceremonies/blessings or places where you hire the whole venue for the whole weekend with camping for all, we would like something small and intimate that better represents us.