Simplest answer if fish from the boat in the water and cast towards land. Avoid running aground on that shore area and you shouldn't have any problems. If the condo person wants to come out into the water to try and get you to move, tell him you'd be happy to call the police and coast guard about the water access regulations. Laws vary state to state, but typically you have the right to fish the waters from the water side provided you arent on a private pond or lake and the only access is via ingress/egress over private property.