My name is RobbiDobbs and I am the Chief Poopervisor of the Pottie Project. I am listening.
Roundfoot: you are quickly learning the ways of the Playa, grasshopper. Be aware that rules change, often without notice. There are indeed adequate toilet facilities for the four-wheelers. There is one Big-Blue-Box on every cluster. There are 12+ clusters, plus assorted pairs around center camp. All pottie clusters are on the 3rd street from Esplanade (this year was on Dogma). If you want to make your excremental experience more participatory, and reduce your dependence upon your holding tank, then I recommend that you plan to camp somewhere along this road.
Also, as Chief Poopervisor, I can safely say that there should be NO PROBLEM WHATSOEVER with you rolling up to the nearest cluster when you need to piddle, and asking to be allowed to jump into the Big Box. They are comfy, they are clean, and this is a community DAMNIT! Just ask and you will receive all the love you deserve. If anyone gives you any shit, just stare at them. Someone will whomp the fucker upside the head... like me.
Aggro? This city was built on aggro. Just ask Dan of the DPW. You might share the same shoe size.
I STRONGLY encourage you, Roundfoot, and anyone else who gives a shit about the Temples of Excremeditation, that you join firstname.lastname@example.org