On social issues, many conservatives may want to get back to an earlier social condition, but they mostly just try to hold the line on pernicious social changes. Bush even promotes more government support for policies that he believes will strengthen families. By contrast, whether they want a sterner or a looser morality, libertarians tend to take a "root and branch" approach to pruning away government agencies and rules.
I'm not saying that the libertarian approach is wrong, just that it does seem to involve abstract blueprints and starting over again from scratch than the conservative way.
On the other hand, a closer examination of libertarians will show that they are not seeking any purer ideological model of the past. What they propose over all is quite new, and cannot be reached by any means of scrapping away everything done in recent decades. Even if we limit Libertarianism to that which is proposed in the more conservative LP platform, the ideas proposed there in, involve a complete new look at the nature of government. Something not achievable by simple roll back.