We are having our DIY wedding on some property that a family friend owns next to a beautiful tank with a dock (a tank is basically a big pond for you non-Texans

). We are expecting around 100 people but only 50-75 will probably dance. We have managed to save a lot of money and I really don't want to ruin that to pay for a dance floor. So the options are dance on the grass or dish out the money... any other ideas?