I live near Sydney so not a "tourist" as such. It was so nice to see something different and hear about the history of Goat Island without having to travel too far! The boat is old, yes, but in a good way! It has great character. The food was great and satisfied my mother's fussy palate as well as having enough flavour for me. The bar was a nice touch too.
My mother is 80 and had no trouble with the walking. Take a hat and sunscreen and wear walking shoes. Fascinating, fun and relaxing.