My mom claims not to know squat. My native state takes closed records very seriously... non-identifying (and purposefully vague) information only, no original birth certificate except with a court order, psychiatric consult just to get hooked up through the state's reunion registry, the whole bit. The investigators I talked to said that my state was one of the hardest and most expensive states to dig up the needed records.
I've recently gotten my mom to talk about the adoption from her point of view, but I haven't come out and admitted that I want to search. I always had the impression she'd be VERY hurt if I wanted to search, but she never actually said anything one way or the other about it, and I may have been wrong about her all these years. My dad couldn't have any children, and I was raised as an only child... one of the biggest reasons I want to search is because I want to get to know my siblings! Yeah, I know it still won't be the same, but I really want to meet them.
a fine and enviable madness, this delusion that all questions have answers, and nothing is beyond the reach of a strong left arm.