Dedelman is on point:  high baserunning IQ guys get caught far less often.  

I've had great success with a 'very aggressive' basestealing setting, but only after I stocked nearly every roster spot with a decent basestealer.  That includes 1B.  Catcher is really tough, since I've only ever seen 1 or 2 that have a prayer of stealing regularly, but in the NL I got around that by always batting the catcher 8th, which put the pitcher behind him.  Since the pitcher is poised to sacrifice, the sluggish catcher does not steal much.  

With 7 consecutive talented basestealers, 'very aggressive' is a winning setting.