Thanks for all the replies. I greatly appreciate you all taking the time to respond.
I think it has more to do with the height / branches of the cedars blocking the oaks from getting to the sunlight than actually taking up all the water, but I don't really know for sure. I was told that the oaks would grow much better if I took out a "few" of the cedars, as they are blocking the oaks.
SL - I'm in a newer subdivision called "Alamo Ranch". It's right across the highway from Sea World San Antonio - off the 1604 loop where it becomes 151. I'm actually not living there just yet - my wife and son are in San Antonio, and I am joining them July 5th (driving down there this week), and we close on our house on July 17th. I've fished in Boerne the last time I came to visit - at Boerne lake, but only from the shoreline. Glad to see that there is actually a trad archer or two in the area. Can you give me any info on shooting clubs, ranges, etc...? Thanks!
All the best,
Glenn