NickyB said..
Hi,
Is it possible to rent a campervan in Perth WA that can sleep 4 (including two children under 4) and also carry windsurf equipment and a stand up paddleboard? I'm keen to get something with all the works: toilet, shower, cooker, fridge, etc.
Thanks,
Nick

Depends on how deep your pockets are... Brits, Maui etc are all good starting points for proper motor homes. But expect to pay in excess of $250 a day for it.

In my experience driving the east and west coasts, WA caravan parks have excellent "camp kitchen" facilities -> so if you are aiming to stay within caravan parks, then you wont need cooker, toilet, shower ... or even a fridge ( a non-electric "car fridge" and a few frozen bottles of water, would suffice for travelling between destinations ).... Obviously, if you are aiming to do free-camping or other bush camping, then you will need those creature comforts.

If you just want to carry say two boards and a few sails, and make use of park facilities - then you dont really need a motorhome -> a hi-top camper with a rear-lift-door would possibly be suitable. Or... you could downsize the van, and purchase a cheap'ish 6-person tent.

It is worth noting - Australia is somewhat backward when it comes to free-camping within "town limits"... you might get a warning and thus encouraged to move on into said caravan parks.

Perhaps another option for you could be hiring my custom built trailer. Unlike other caravans it is very "minimalistic" inside and has a large back door so many toys can be carried. Like you I have two kids, so two removable bunk beds in the back and can comfortably sleep 4. Also has the Oz tent that attaches to the side for more storage/sleeping space.

Of course you would still need a tow car.