I will be in San Antonio for the first three days of November. I am looking into going to the Tejas Rodeo on the Saturday night. I am staying in Riverwalk and have checked that the distance to Obst Road, Bulverde is 25 miles, 30 minutes. I won't have a car and really don't want to rent one. How much would a taxi be for that distance, and with regards to getting back around 11pm, will I have to have one booked in advance for that night? Rough estimate or how to go about finding more info much appreciated!