I use a briefcase for things like walk around and restaurant. Similar to this http://www.amazon.com/RoadPro-SPC-931R- ... B001DEPOLC
For general close up stuff like busking and birthday parties I use a briefcase table. http://magicshop.magictricks.com/table- ... -base.html
For the once-in-a-blue-moon stage show I do and more commonly fairs that exceed a couple of hours I use a microwave table that I picked up at a yard sale for $5. Slapped my logo on the front and glued a close up mat to the top. The cool part is it has cabinets with shelves in the back so I can use it to carry my stuff.
There's a whole lot you can use, as long as it looks professional and your not awkwardly carrying your stuff around.