Back in 2001, a Yale student wrote an article in
The Libertarian Enterprise about a movement to secede from the US. He followed up with an article changing his idea from secession to political migration (like Amish in PA, Mormons in UT, etc). Their plan was to find a state with a small population and relatively small political party budget (both Dems and Repubs) and have 20,000 people commit to moving there, so their Libertarian agendas would have a high chance of success. In 2003, they chose....
New Hampshire
In 2016, the list of people who pledged to move to NH reached 20,000. People were then expected to follow up on it. Their mission statement is: "Liberty in Your Lifetime! The Free State Project is a mass migration of more than 20,000 people who have pledged to move to New Hampshire for liberty. By concentrating our numbers in a single state, we are maximizing our impact as activists, entrepreneurs, community builders, and thought leaders." They state on their site: "The FSP is not a political action organization. It is not tied to any political party or organization; it does not run candidates for election; it does not financially support or endorse candidates; and it does not oppose or endorse legislation."
They're still going, but I don't think it's as strong as they wanted. It's been six years and their own website reports there are 6,232 Free Staters living here currently. The reason I know about this is my son's first school, which closed in 2012, was started by a married couple who were Free Staters. They're divorced now, and last I knew, are teaching at separate schools.