Most of the flavor compounds your after in a vanilla bean are alcohol soluble. This why pure vanilla extract has alcohol in it. I just posted this in another thread, here's what I put into my Vanilla Bourbon Baltic Porter
Racked to secondary onto 16 oz of burbon
8oz's of wild turkey
8oz of knob creek
Bourbon had 2 vanilla beans, split and halved soaking in it for aprroximately 2 weeks. and 1 oz of oak CUBES for 1.5 weeks.
2.5 weeks primary
1.5 weeks secondary
3.5 weeks in the bottle to carb.
And Yeah at the ABV level of bourbon nothing is living in it.