You can forget about it being changed unless the land owner changes his mind or he sells the land. He owns the land the stream is flowing across. You can use the water way because it is considered navigable but you may not (in the state of Oklahoma) touch the stream bed or shores with your person or boat or tube or whatever you are floating in. He owns the ground and if he wants to restrict access he may, according to the laws of this state. There have been long standing fights over this issue in Montana for decades. Just do this google search, "stream access supreme court". You will see what I mean. Colorado and Wyoming have dealt with this issue also. The only way the public will get access is changing the laws of the state. If the access fights in those states that rely heavily on fly fisherman dollars are any indication, then we can forget about it here, where sportsman's desire to access flowing rivers is chicken scratch compared to land owners influence. By the way, if this land owner is restricting access for the same reasons most others have in these other states, then the motive is not trash or trespassing, IT IS FOR THE SOLE PURPOSE of keeping people from using the section of river that is in their property. They want it for themselves, and they will force law enforcement to enforce the laws of the state whether law enforcement wants to or not. Which includes the Wildlife Dept