Step 1 : Introduction to the question "3. Speaking of other states, I recently met up with a few Sandgropers - mainly grommets and their sheilas. Who did I meet?"
...1. Some Queenlanders and a girl named Sheila 2. Several men from the Northern Territory and their dog 3. People from Tasmania excavating sand 4. Some young West Australian surfers and their girlfriends A Sandgroper is a West Australian, grommets are young surfers, and a sheila is a female (as in "she's not a bad driver.. for a sheila")