So far, so good...
However, I would make an exception for abortion,...
Oy, vey! The very next sentence! This is what makes you a "conservative" and why I am offended when people (including conservatives) insist all Libertarians must also be "conservatives."
Two wrongs, never, never, NEVER make a right! You just got done saying that the federal government should not legislate on crimes not in the Constitution, and then--in the very next sentence! :-(-- you want them to legislate on a crime not in the Constitution!
I have a better suggestion...why not simply follow the @#$% law?! The problem that you identify can be LEGALLY addressed in 2 ways, 1) a majority of Supreme Court justices can be found to overturn Roe vs Wade, or 2) a Constitutional amendment can be passed, like the 13th Amendment that prohibitted slavery.
The "problem" with solution #2 (from your perspective, not mine!) is that you will almost certainly NEVER have the public (more accurately, Congressional and state legislature) support for a Constitutional amendment banning abortion.
Since you can't find that support, you instead support federal officials violating The Law (the Constitution). That is so very bad, and sooo annoying (to those of us who want the Constitution to be followed). Your (and others') "solution" to the various "problems" has led us to the point where these United States are no longer governed by the Rule of Law. We are now ruled by men and women.