smoker cabinet

[Pete Vance]

I am going to build a cabinet for my WSM 18". I would like to keep most of my supplies together and handy. I have a basic plan in mind but need some advice about distance. How much distance should I leave between the wall of the cabinet and the smoker? I will have the option of having one or maybe two sides (depending on final plan) open for cooking. Also considering lining the walls with aluminum insulation.

Any help and advice appreciated