Tent camper chuckwagon

I am planning on building a chuckwagon with storage for when we go camping. My family tent camps. I would love to build a TD but we need more room. I saw a thread where someone posted a photo of something like what I am wanting to build. It will basically be two boxes. The front box is for all our gear. The rear box is the chuckwagon. I am planning on building it on my utility trailer. It is 5 x 8. If anyone has seen something like this let me know. Here is a google sketchup of what I am thinking.
