Tony i think it will work, even better put it under the table where it will get less condensation. I use one of these:
http://www.kangarootentcity.com.au/p...furniture/1240
and put all my electrics in the bottom, even my 40AH battery will fit. Zip it up and it stays dry. Its also a good laptop workstation and i use the storage box on top as shown in your photo to keep the laptop dry.
These days i am mainly in my obs but i still use the popup cupboard.