Mine's a Merhow (made by Trailet) which might not be a brand you have in Australia. It's 80" tall, to accommodate tall horses like Warmbloods or Draughts. It has a small tack room up front, which has a separate locking door and is insulated and waterproof, but it's only about 4' by 5'. Plenty of room for all the tack as well as whatever supplies I need to camp at clinics or events, but not big enough to sleep in.
The horse area is set up as a two-horse straight load, with extra room in front of the stalls to transport bales of hay and straw or whatever. All the dividers can be removed though, to make it a two-horse slant, if you give up the bale storage in front.
It doesn't have a built-in awning, I just bring along my camping-type awning to set up.
Back in the day when I was competing in lots of Events, I would bring a tent and camp in the approved area. Now, my old back can't take sleeping on the ground, so hanging my hammock in the horse part of the trailer (after I clean out the manure, of course) is the most comfortable and restful way to go for me.