Well, we have a fundamental difference in philosophy regarding how government works. My philosophy tells me that the weasels in the government respond to one thing: power. Threaten to (or actually) take that away and you get change.
Your philosophy tells you that if you write a letter to your congressman or senator, assuming they are a republican (not my case in the great state of California), they will listen attentively and change because they respect your opinion.
How's that working for you?
I will tell you there's a third way-- support candidates that actually give a damn and are true conservatives with your cash. I have supported many republicans that don't even represent my state or district, but I will never give to the Republican party.
I can't speak for all libertarians, but I will say that you and I share a lot more in common than not. I was not responsible for the loss in November as nothing was even in play in my state-- and I voted in a way that most folks around here would have heartily approved of.
But that may not always be the case. My vote is a silver bullet (so is yours).