I will give you my take as it sounds similar to yours (working, non-trad, family, part-time school, UGPA). I did well on LSAT and got great scholarship from a T4 based on the LSAT only. Graduated in top 20% of class and passed bar first time. I do not speak from a disgruntled perspective - I have a great job and great family, and paid very little for my JD - I just look back on it as a waste all things considered. You can read my other posts on this subject.
My schpeel on law school - ask yourself 'why?' Do you have a burning lifelong desire to be a lawyer or does this seem like the thing to do lacking any other ideas? Unless you get a great scholarship and can go to school without wracking up unsustainable debt I advise against going - unless it is your dream to be a lawyer and you get into a T1 school. The job market for lawyers is brutal, especially for non T1 grads (yes Bigs, its tough on everyone and no job is ever guaranteed, hard work, luck, all of that stuff...). Do your homework and truly know what you are getting into if you pursue this - there is a growing community of anti-law school blogs (linking main-stream media articles) that give a lot of reasons to consider.
Law school is a brutal time drain - plan on substantially missing 3+ years of your kids lives while you go to school. That time away takes a huge toll on the kids, jacks the household stress level up 10-fold, and places a huge burden on your spouse to raise the kids. You are either gone at school, need to sudy, there for a limited amount of time b/c you have to study or go to class, or you are there but not THERE. Think about it and ask whether it is worth it.