Well, you have alot you can do. First of all, why not buy a bunch of hot wheels tractors and such to match John Deere equipment in yellow and green (or spray paint them yourselves) and then cut some yellow little deers you can glue on to them out of felt and attach tags to them to display on your tables (3 or 4 per table) that read "Deerly in Love " and your names. Or, why not make small favor bags in yellow with green bows with little charms of tractors and such? Those are sometimes easily found on Ebay and such. You can even fill them with cinnamon sticks for an outdoorsy feeling. You can also buy at Michaels wooden little tractors and such that you paint yourselves. You can use these as favors for your guests or to make a centerpiece. For a centerpiece, why not try making a platform that you spraypaint in green and then have a yellow platform. Make chocolate lollipops in the shapes of tractors and other equipment but buy the chocolate in shades of green and yellow. Tie a ribbon in the alternating color around it and make tags that read, "Love doesn't have to be such hard work" and your names. Lastly, for a cake favors, why not write a poem and print it out on the computer. But print it on yellow paper. Then buy cardstock in green and cut out a shape like a tractor. Have the yellow poem rest on the green and then at the end of the poem write a slogan "Nothing Runs Like Our Love" and sign your names. . This sounds like a really fun and fantastic wedding! You can always also incorporate gold instead of yellow if you want it to be a fancy tone.