Keep in mind that the folks who use your credit score are those folks who want to add to your debt load so that they can benefit from the interest payments!
Given that bankruptcy is a means toward a new start - a fresh start - then the fact that your credit score may drop anywhere from 150 -200 points (based on a quick Internet search) may not be the problem we have all come to think. A fresh start is not intended to put you in a position to get new credit driven debt - but to minimize your use of credit and allow you to live within your means - a cash only existence.
To take this thought further, let's assume that you already own your home (meaning you have a first and maybe even a second mortgage) and even a car loan. It is very possible to keep all of these things even after filing bankruptcy (a Chapter 13 (more on that later) Bankruptcy will even allow you to catch up on missed payments). Therefore, is it not fair to say that your credit score - whether high or low - is of less significance since you're not trying to qualify for credit?
Your credit score is important, but let's keep it in perspective!