Setting up a mooring of a permanent, or semi-permanant, nature will be within the provenence of the local authorities. You can anchor as you please within the limits of navigational considerations as long as you remain upon the boat. Once you leave the boat is when your anchoring becomes problematic as a matter of law. At that point, the question can be rightly raised as to your operation under the applicable laws and rights to navigation upon the navigable waters of the US. Anotherwords, you can transit and anchor as part of that transit as you please but the point at which you cease to actively transit, or navigate as it's written in the law, your rights become rather tenuous. And leaving the boat for a significant period of time giving evidence that you are neither inhabiting the boat nor navigating the waters applicable in transit would bring you back into the local juridiction's provenence. billyruffin's speculations approach metaphysical certitude.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.