jdfish here is a link to a prior thread which might help. It contains a link to a study on HSB in ponds which contains a ton of info. There is a lot of HSB info here. If you have a good forage base and will be feeding then a moderate # of HSB (use advanced size stockers 10in) will not effect a balanced population of LMB. There will be some competition between adult HSB and smaller ( 10-14 in) LMB. I would suggest that a bigger problem than the HSB would be a LMB crowded lake if you don't harvest enough LMB.

http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Main=1352&Number=14687#Post14687