From what I've read if you have way too many bluegill (stunted) eventually your bass will almost dissapear as the bluegill will eat the bass fry/eggs. You'll be alright for a few years until the large bass die of old age. Not to mention the fact that you're bass will be harder to catch as they have plenty to eat.

There is no reason why you can't have large bass in a balanced bluegill/bass pond by simply installing a size limit on bass, throwing back some of the larger ones to grow big. If you're having problems with bass stunting problems you'd be better off removing the bass that are showing signs of slow growth (say skinny bass under 12"). Some suggest removing 25 pounds of bass per acre per year until they show signs of growth and weight increase.

You might also consider trying to increase the forage base (golden shiners, crayfish, etc). Another method would be to stock fathead minnows, although many will tell you they'll only amount to a quick snack for the bass. Still, if you have the money to spend stocking them once a year in the spring can only help.

I'm sure you'd get some good ideas from these guys on the forum.