Find a farmer who would create a maize maze using the Free State Project logo as a design. This would be a fun destination for a PorcFest outing if it was in New Hampshire. It would be visible by google earth. How many people would prepurchase tickets to make this possible? It could be run privately with a portion of admission going to pay for the new "Live Free Or Die" signs proposed for the border. This would benefit all NH taxpayers, who would be more likely to patronize.
Get one of those penny-smushing machines that would turn Lincoln into a Free State Project trinket. Sell these at the maze maize, or a more high traffic location. Properly located, it could be a self-funding publicity machine. I'm not sure of the legality of this, so this might be controversial, for better or worse.
Create Free State Project postcards and make them available for NH businesses to sell. They would be seen by lots of tourists as they browse the racks. Those who have made the move could mail them back to friends. Visitors could make a point of patronizing those businesses that sold the postcards. A list of available locations could be provided on the Free State Project website for those businesses that wanted to be listed. One possible image for the postcard? Perhaps an aerial view of the FSP maize maze. It doubles as advertizing.