My buddy is a fabricator that specializes in welding trailers and camp trailers. He is pricing out the frame right now and is going to work me into the mix. Once the frame is welded I will take it to the Powder Coat shop and have it coated. Then we will install the axle. While I'm waiting for the frame I will start on the side walls. I am going with the sandwiched insulated walls. Exterior and interior ply will be marine grade ply. I should mention that I build boats as a hobby, so I am well versed in the types of materials required.
Enough talk. Here's some photos of my plan, and a few examples of what cooking equipment I need to haul around.

[imghttps://farm2.staticflickr.com/1500/26352150981_8ee1a7f48f_c.jpg[/img]
Our last camp trip cooking gear:

Discada Set up on its burner and cooking

And the smoker:

My Sous Chef was making sure everything was up to par!