RE: Which states require permission?
Are you saying you can afford all this stuff but you can not afford to post it? If the signs are plain and visible I do not thgink they would push the 50 foot issue with you. Here it must be posted and some skip some areas if going across a large field. They would post something like 100 feet enough so it is clearly notice able. Unfortunately some would sneak in under the cover of darkness to get your trout out if they really wanted to though. But why is it an issue that you can not post it?