There are some Austin fishing forums you can check out that will have some info about Buchanan, I haven't fished in since last fall and I moved. Recent tournament there took about 23# to win. Since the lake came up the flooded bushes have been the deal. Jigs, shakey heads, spinnerbaits, buzzbaits, t-rigs can all be winners at times.
Was never able to get on a good deep water bite, but there are rock piles to find that do hold good groups of fish.
LBJ is good bet for you as well and closer possibly.
Faith. Family. Fishing.
PB - 11 lbs 1 oz