East Wind Transportation

Hey All!
I'm getting married At East Wind in Wading River 7/27/18. Unfortunately, they only let you book 10 rooms until 3 months before your wedding for a room block. We have to book aonther hotel as well, but I was looking into getting a shuttle to get people to riverhead and back. I cannot afford to shell out a thousand dollars for this unfortunately, but I was wondering if anyone had any ideas or recommendations for this?