Hi neighbour Dana.
I took my K10D and a couple of lenses to BM last year and it was fine. My skill level wasn't that great but the camera was fine. I didn't take but would now, a rocket blower.
I did take a few precautions, The other lens was in it's own case as well as in my kit bag for extra protection. I took some of those big ziploc bags and put the camera and spare lens in those when I went out. That way they could be in my backpack with my water and mask. Only use the bags once, that minimises dust transfer and you can reuse them for other stuff when you are packing. I even got a ziploc big enough for my kit bag!
You won't be taking shots in dust storms, you'll be taking shelter. Lighting conditions aren't too bad, just bracket and or review to see what works. Centre camp is well lit. Night shooting can be difficult, if you use the on board flash you will get nice/annoying sand spec bokeh in the shot. If you take an off camera flash, just ask someone to hold it for you, they'll be happy to help. Take a pencil and one of those small post it notes so that you can give and receive email addresses. This will be especially useful when taking shots of people. Don't forget to ask first, it's the BM way.
My camera gradually got dusty throughout the week so I just took it in for a clean. A worthwhile expense after taking it to BM. The poster who had another desert experience probably didn't have that luxury so keeping it constantly keen was much more important. Congratulations Janosh for managing.
There are some nice mountain panorama shots when the conditions are right. We always try and arrive around sunrise, there are some beautiful panoramas that you will pass on the way to the playa.
There will probably be some aerial opportunities; smoke rings, kites, parachutists with smoke and people flying in.
Out in the desert where the art installations and temple are, the light is going to be bright so just pay attention to where it is and shoot accordingly.
Your zoom should be fine, it will be much easier with no lens changes. Just take the 50 1.4 as a backup and keep it sealed. Then you can make an on the ground decision whether to use it.
Have fun, drink your water and don't worry about your camera, just be careful with it.
If you have any more specific questions, please feel free to PM me.
Gary