Heir rights

Can I move in with someone that put a trailer on heir property. In tangipahoa,la our cousin put a trailer on the land next door to the family home where a uncle stay ,property undivided ,no succession . Can he stop me from moving in with him. Before someone say I am trepassing heir property he did not get anyone to sign for a spot ,he just got a spot. Property is homestead exempt in grandfather name
c/o grandson tgat stay in the faamily home

Heir rights