Yes, there are signs to help determine which state you are in. Try to get familiar with the state lines on a map so that you will know when and where to start looking for the signs. Sometimes they kind of blend into the background. You should be okay going up the Wolf River. The line cuts across Sulphur Creek and I believe it is enforced. Also, the bay out in front of the lodge falls into the reciprical license agreement but make sure you stay to the east of the line from the eastern mouth of the Obey River to the point at the north side of the bay. There is a sign there to help you.