Rolling Computer Backpack

I need a table and chair that I can fold / roll up and put in a backpack with a laptop so I can work in places that have no tables. Ideas? Camping Stuff? Those I have seen so far bend, but would not fit easily into a backpack. And the chairs that fold up are to look back and seat, not working at a computer in.

http://www.nwbackpack.com/products/trave ... there is a small chair very compact, which fit in any backpack.