I'm a Libertarian. And I'm a Social Conservative. There are a lot of parts of the Social Conservative bit I will die for. Other parts, I just say, "meh." And I don't think I'm the only Social Conservative who thinks this way.
1) Abortion: this is a human life in every instance and there's no chance I'll bend even a millimeter. I frame this as a human rights issue, not a moral one. The fetus is what? an animal? a tumor? a human without rights? a human with rights? Answer the question.
I'm not against stem cell research, either. I'm all for it unless you add the word "fetal." Fetal stem cell research by my way of looking at it is cannibalizing parts of one human for the benefit of another human. If you disagree, prove to me that a fetus isn't a human.
2) Sex, drugs, and rock & roll: meh. Who you take to bed is your business and not mine. If God says "thou shalt not," and you think otherwise, that's your problem with Him not me. Don't mess with the sacraments of any church or say what moral standards the church can't hold and we'll get along fine.
3) Prayer in school: meh. When I was a lad, my sainted mother the separatist Baptist Fundamentalist that she was thoroughly disapproved of the sort of compromised blended ecumenist prayers bandied about in public forums. That rubbed off on me.
Creationism and Intelligent Design (they are different things). I want free inquiry about questions of origins, but it's not a hill I'll die on. If you're upset that some state school wants to teach Darwinism, switch to a private school that doesn't.
Personally, I prefer the separation of school and state. Less opportunity for indoctrination or similar mischief.
Can we agree on these boundaries and live together in the same party? I think so. Maybe we won't go to the same church, or maybe we'll bicker on a personal level, but as far as the civil realm of governance is concerned we've got issues of the proper role of government (minimal) that we hold in common to unite us.
What would Reagan Do?