That's all I asked for, is a real source of proof.
Not surprising that you trust one of the most biased papers in the country as a "real source".
So she wasn't an official member, but she still attended meetings and even seems to support them in the video she did for them.
Did you read the whole article?
Ms. Palin remained a Republican and never joined the Alaskan Independence Party, but returned to its convention in 2006 to speak as candidate for governor. After she had been elected, she recorded a video greeting that was played at the party convention this year. “Good luck on a successful and inspiring convention,” she said. “Keep up the good work, and God bless you.”
I challenge YOU to find evidence from a "real source" that she regularly attended meetings. She spoke to them as governor and she welcomed their convention. It's what governors do; they promote meetings where people are spending money in the state economy.
Further, you don't seem to be aware of the party principles. It is more focused on state's rights and state sovereignity than secession. Hell, Jefferson and many of the founding fathers were focused on the exact same thing when they set up this government. You think that's a bad thing?
Hell her husband was a member for what 7 years? That's a little too close to the home to claim she had nothing to do with them.. 
Yet the Libbies easily dismiss The Obamessiah, with his wife and children, attending Rev. Wright's extremely racist church. Dismiss the close to home claim by Obamessiah himself that "“For 20 years, Rev. Wright has been a ‘friend, mentor and pastor.’ (February 5, 2007)
What's worse you think? The husband of the potential Veep being a 7 year member of a state's rights party in the mold of Jefferson or the actual candidate for President himself claiming a demonstrated extreme racist as his friend, mentor and pastor of 20 years?
You people are a bunch of lemmings.
Check my sig block.