Traveling with a dobsonian

Hi guys! I have recently finished my scope and had a chance to use it in the city only. I am planning to go to visit my family in suburbs and show off with my new toy. 8)
How do you carry your tube? Should I take out the primary mirror with the cell or keep it inside? What about the secondary - it would be kind of hassle to unmount the whole spider...
How does one travel with a dobsonian scope? :S

If you just make sure the tube does not roll around, you can put it in the back seat, rear of the van or truck, without damage. That is if your mirror cell is able to keep the mirror in place when horizontal.
You can use a couple of pillows or anything to provide support for the tube and insure that it sits still.