I recently went on a 3 day guided walk along the Great Ocean Walk. I did it as a fundraiser for the Guide Dog Association, and because it was a fun thing to do with my friends. Raw Travel (part of Intrepid Travel) were the ones who made sure that we had a great place to sleep (Lighthouse Cottages), delicious food, and we didn't get lost! I was a little hesitant as I thought that only people over 45 did Australian guided walks, but Mike and Dave great fun and I thoroughly enjoyed not having to worry about the finer details of the hike- like not having to carry my own chocolate supply. Their other overseas trips sound amazing and will definitely look at doing them in the future.