If you don't want to purchase the plans on eBay, Google Books has published the entire May issue of the magazine. It ran on pages 132 to 137 and was continued on page 200.
The link will take you to page 200. You can find the begining of the article from there.
Here's the eBay description:
Up for bid is an ORIGINAL seven page plan from a vintage magazine. This article details the building of an awesome carry all trailer designed ultimately for cooking when camping, vacationing and on fishing trips.
This Chuck Wagon has it all even a speaker system. This is a complete kitchen with hot stove, pull out table, drawers, storage, compartments for clothes and food and even an iceboxbox for perishables.
This trailer contains everything you could need and want for any camping trip, hike and even tailgating at a game. You receive the original plan not a copy.