Off-Road trailer in Perth?

Howdy, considering getting rid of the trusty old ute (2 x rego's, insurance, maintenance, parking, money tied up etc) and going for an offf-road trailer instead.

What I'm chasing would be secondhand if possible (but realistically it'll most likely have to be new), single axle, decent length draw bar, similar track width to 105 series Cruiser, ability to run 285/75/16" rims. I just want a practical way of carting general bits and pieces around and on trips away, have the space to throw all the extra stuff that makes an extended stay more pleasant and some better method of carting out my rubbish. I don't want a flimsy 'garden' unit manufactured from aluminium foil that'll split in half on the first dirt road it sees.

I have performed a search of the archives (please take note Monsieur Truckster;-)) and will also 'let my fingers do the walking' tomorrow. So, my questions to you all are as follows.......

Q1 - Can anyone suggest a good company in Perth who sells such a beast or point me in the direction that I should look?

Q2 - Also, what would be a fair and reasonable price for said machine?

Q3 - What are the legalities of carting extra fuel and cooking gas around in a trailer using either jerry cans or in a 44? A 44 gallon drum of go-go juice and a McNaught rotary pump would give a 415l fuel payload = a looooonnggggg way between pit stops.

Thanks in advance.