I have seen a guy on my local lake that has a piece of coduit with a couple inches of cement in the end to keep it from filling up with mud and weighing it down. He slides this through a conduit strap that is attaches to the side of his boat and just sticks it in the mud when he needs it. Not real fancy but it works. When he is done he just pulls it up and straps it down with rod saver straps.