If you're looking for a quick, easy and inexpensive game map, a buddy of mine came up with this idea for another game, but it would work well here too.
If you have a basic craft store near, you can buy a 3 x 3 foot piece of green felt for next to nothing. I think even WalMart has a craft section. I've seen these 3 x 3 pieces in basic colors for $3.99. There are also smaller square, one foot pieces of felt for pennies that yopu can buy in dozens of different colors. I've sen these pieces for as little as 17 cents apiece. You can then cut these pieces into smaller squares of various sizes, shapes and colors and glue them on with Elmers or Tacky glue to represent the various shapes and colors of fields and such. it makes a durable, colorful playing area that travels easily, is inexpensive, can be made to whatever size and shape you want, and you can even spice it up with a fan brush and some basic paints that can be found at an equally inexpensive price.
But there are two different game matts coming soon for WoW, as well as barrage balloons. As far as the extra pegs go, I have all the three sets so far, and somewhere in gathering all of those in, I found that the issue of needing extra pegs just kinda seemed to take care of itself.
But for those who don't have all of the planes, there was a company called Litko that made some products, such as flight stands and pegs that were compatible for use with WoW...I hope I'm allowed to say that on here!