How Much Parental Advice?

I am venturing down the path of "Greekdom" with my college son. I have a few questions for you: 1) How much influence did either of your parents have on your decision once you were clearly approached? 2) Did you share everything with your parents? 3) If your dad was in one frat and your stepdad was in a different frat what would you do? Son is tight with both dads. (Girls...what if your mom/stepmom were in different sororities?) I am honored to be close with my son but come fall '05 when he starts his sophomore year and at his school he can do this. Some frats have already approached him. I though you had to be a Junior at least huh? I want to define my role a little bit better. Know my bounds and be correct on my info. (I have many friends in every frat/soro) I am supportive of him becoming a member of a black fraternity. He is leaning on me for loads of advice because he does not want to offend or mislead either dad...he's cool like that. Thanks for your thoughts!