I figured this can totally fall into our group's realm! 

I found the article here:

Here are the simple steps:

1. Remove dirt: Wipe the exterior surfaces of the pumpkin clean using a damp cloth.
2. Make a bleach solution of1 tablespoon of bleach (typical brand name "Clorox) per quart of water and put it in a spray bottle.
3. Spray the pumpkin inside and all cut areas of the pumpkin with the solution.  This will kill much of the surface bacteria and mold that cause rotting.
4. Let it penetrate and dry for about 20 minutes
5. Next, rub all of the carved or cut surfaces with petroleum jelly. This will keep out new bacteria and molds as well as dramatically reduce the dehydration!
6. Wipe away excess with a paper towel!
7. Now, keep your pumpkin out of direct sunlight and try to keep it as cool as possible (but above freezing!) and you should get at least a week's enjoyment out of it! Then when it's time to go, you can employ several thousand laborers to build a giant pyramid in your backyard to entomb your Jack O'Mummy! Next week: building a pumpkin sarcophagus! Ok, maybe we're getting carried away. But hey, kids love the analogy; anything having to do with mummies or dinosaurs!

This is awesome! Thanks, I'm totally trying this :)