We're just finishing up our local dog park too =) Our website is: www.wallawalladogpark.com -- check it out. We'll have about 2 acres total separated into a large and small dog area (though the small dog area is small relative to the whole. We will have a drinking fountain for dogs (nothing too huge) and a 12x12 covering for people in case of rain.
But a few months ago Bark magazine did a special on dog parks and you should have seen these fancy places. Several water features, a whole dog wash center/food court in the middle...elaborate stuff!