I am not actually for the small state that many minarchists are, I rather use the word libertarian to describe being pro liberty, as well as because I relate to the American Libertarian tradition as embodied in figures liek Adams, Jefferson, Lysander Spooner, Ludvidg von Mises, and my absolute favorites Murray Rothbard and Jeff Riggenbach.( Spooner, Rothbard, and Riggenbach are all Anarchists wearing suits :p who are masters of economics)
I am individualist in that I value the sovereignty of the largest minority( the individual), but as an individual I understand that we are all in this together, and truly must work together in cohesion in order to topple the state and its corporatist/mercantilist arm. To destroy the state we must replace it it with a community effort, which I find greatly embodied in the groups you mentioned, especially the mutualists I love those guys! Communities must be reforged, charities and social care networks born anew, and the culture must be shifted into one that respects personal and moral responsibility, as well as respects and desires to help their fellow man. ( A desire I have seen in nearly all children until it is wrung out of them by the archons, be they religious, familial, or GASP!THOUGH PUBLIC EDUCATION)
Good examples of Libertarian group efforts in America would be the Ludvig von Mises insitute( MY FAV SOURCE for Economics and History of the Man), New Hamshire's " the free state project", and the American Agorism Movment. I also know many american Agorists/ Libertarians/ Anarchists that work in the manner of the syndicalists you described, and it is very inspiring.
Consider this, under many forms individual anarchy, there would would be nothing barring individuals from forming voluntary collectives in the syndicalist and mutualist spirit, and in a true free market I believe that labor will be seen as more valuable and important( and quite possibly one of the most dominant currencies)
For individualist anarchism to truly be workable, it must be a group effort, but a group effort that respects the rights of its individuals. As long as it doesn't involve coercion or deception I am perfectly fine with any sort of communal or individual effort and any new experiment in community organization
I recommend giving a listen or having a read to Rothbard's " For a New Liberty" aka The Libertarian Manifesto
the text and audio book can be found over at the mises website in addition to a plethora of other free materials like books, pdfs, video lectures, blogs, articles, and readings
"if we want freedom we are going to have to give it away" they say AMEN
There is also a highly active discussion in their forums including mutualists, syndicalists, individualists, and anarchies of all stripes and colors. I think you would really enjoy it over there
mises.org is their website
oh and here is the link the freestate project if you want to check that out
http://freestateproject.org/
we needs a branch in every country ;)