Ministry is about service. Figure out how you can best serve the disc golf community in your area, and you're bound to make some friends. In other words, don't think about how you can use disc golf to serve your church; rather think about how your church can serve your fellow disc golfers.
And to those who say "Disc golf is a hippie/redneck/whatever sport that doesn't mix with the church crowd," remember whom Jesus, a homeless man, chose for his closest disciples: whores, tax collectors (don't we all love IRS agents), and a passel of fishermen (imagine the filth and the smell). These people would likely make the disc golf crowd look good. So don't worry if you don't feel like you fit in with the Church crowd in their Sunday best. Jesus didn't much like hanging out with them either.