This is a theme puzzle with the subject stated below. Find the listed words in the grid and when you have completed the puzzle, there will be letters left over. They spell out the alternative theme of the puzzle.
Holiday in South Australia adelaide avon Berri Blyth Bowden camping carpa charleston city clare cleve cummins echunga Goolwa halidon hot hove Ki Ki Kimba Laura Lyndoch
Solution: 28 letters
Bridge nuriootpa oodnadatta orroroo Picnic Pyap robe rundle mall skye st agnes Tent Travel unley ute Wine