Pottz, Ron - thanks, guys.
Splinter - the dowel centers are a good thought if I can keep them from scratching the wood while positioning the legs. I'm not sure how much flex they'll have once the stretchers are glued-in. Unfortunately, I don't have any dowel centers to try that method.
Rob - Now Sam was a real craftsman. I envy the guys who can say they attended one of his classes.