Maybe a general factoid for those shopping. Such as:
the difference between fondant and buttercream and gumpaste, and marzipan.
differences in scratch vs mixes
questions one should ask a baker when ordering
a breakdown of why cakes are priced like they are (labor, ingredients, overhead, etc)
I'm out of ideas. My brain must be in neutral. Good luck to you and I hope I was at least a little helpful.
Maybe start with how ideas come to you. Then start with what recipe would be most appropriate, ie a dense cake for carving, etc. Then how you would go about decorating it, like would you need fondant, or would buttercream do it? Then loose description of the process (how to dye the icing, roll and cut fondant, how to apply accents, display the finished product). Maybe make a small cake to take pictures of for it, and include the recipe you used.
Would you post your article after it's run, so we can read?
Congratulations! What an honor. I am sure you will do beautifully... be sure to scan it so we can all oooh & awwww 
I absolutely LIVE for the 'Taste' section of our paper on Wednesdays. Perhaps include a little blurb about how involved cake decorating is, to enlighten those lost souls who expect us to bust out a 10 " with fondant roses in 1/2 a day...
just a suggestion 
First, off I am green with envy. Second, KISS =keep it simple stupid. Give easy recipes and easily done decorations. Pick something that a 12 year old with no experince can do but looks Wow! Don't be afraid to mention the advanced stuff and certainly include a picture or two of really fancy stuff. If spray colors are avalible at your supermarkets you might want to use those for stencil work. Basicly use stuff they can get at grocery store.
Whoa! Very cool!
How did this come to be? Exciting!
Since you don't sell cakes, maybe you could get together with someone else who has a bakery there in your lovely hamlet. You could maybe ask what their most popular flavors/designs are, or if they have an original recipe they would like published. (they may be flattered and you can take a little pressure off yourself).
We rented a Lincoln City beach house for a week last summer (as well as on our honeymoon 10 yrs before). It is the best ever. Stayed landlocked in Kansas this summer ---Waaaaaah 
Have fun with the challenge! Yet another excuse to eat cake!
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