Deluxe camper trailers http://www.deluxecamper.com.au/ are pretty easy to set up and have two double beds, they are very similar to the Trak Shak http://www.trakshak.com.au/, both are very easy to put up and have only a few poles.
Otherwise look at some hard floor (Cub, Liberty, Kimberly, Tvan) or wind up (Jayco, Coromal, Goldstream) campers.
There are also the off ground CT's such as Ultimate, Camprite etc.