Hey Paul! What are you doing, living in Oz? Come live in Western Washington and never see the sun again.
(Kidding . . . but the whole U.S. has a heatwave except for us. I guess it was sunny today & yesterday though).
Have you read the Survival Guide yet? It's still 2010's (the new one might appear any day) but it's still likely to keep you alive, generally speaking:http://www.burningman.com/preparation/event_survival/
RVs are really hard to find this late in SF or Reno, but if you check other semi-nearby cities you might
To find rideshares (some are offering RV spots), post here:http://rideshare.burningman.com
To find a theme camp, look in the 2011 Theme Camps
forum, click on their links to read about their goals and amenities (most of them provide shade) and write the ones that appeal a nice email indicating why you like their mission, how you can help, etc.viewforum.php?f=188
If you're traveling from place to place in the city, you might like to carry a UV golf umbrella in addition to the right clothes, hat and sunscreen. If you feel yourself baking and are further from the camp than you mean to be, there are many, many shaded playa bars & theme camps to visit, not to mention Center Camp, & random invitations from nice people.