If you fish the river NOW when the river is high you will have no problem with an eighteen ftr.The fish will be in the current breaks,I could tell you more as for locations but it took me a number of years to learn these spots when I ran my boat in the river so all I am going to tell you that a fish is not any different than you or I,If I don't have to move against a lot resistance then I am not going to.Good luck and go get them.