I used to work for Ron's campaign, and also know many of Rand's staffers personally.  I can most likely convince my friends at young americans for liberty to accept them, and possibly Campaign for liberty as well.  Ron has a little trouble wrapping his head around the concept of bitcoin, and he's been a gold guy since before most of us were born, but he was receptive to the concept and is all for competing alt currencies.  Rand is likely pro-bitcoin personally, but his political people are really cautious about anything that could be played against him when he runs for president.  They would be afraid of "rand paul accepts non-american currency commonly used for money laundering" or something to that effect.

I'm involved with a PAC that is supporting Rand, and we have accepted bitcoin donations that will go toward supporting Rand's presidential run.