Becoming an independent entity isn't impossible however, the people from Sealand did it, and so did freetown christiania.
LOL. Go tell the US government you are taking their land as your own.
Thats not really a good way to do it. The best way is to go live in a "grey" area, like Sealand, they live on an old rig in the middle of the ocean in international waters. We have tossed around several ideas, from doing something like getting our own rig, or buying a large sail boat and using that as Navismaris.
Also I'm not putting you down but anytime I mention a micronation someone always says "Go tell the US government you are taking their land " and I just want to make it clear, that the US government wouldn't do anything for the main reason they wouldn't recognize us as a sovereign entity. If anything we would be seen as non-violent protesters.