Spruce - it won't get slippery or slimy when wet -
That's what they used to use for the planks on bass-stands...
And no, I wasn't there at the time...
"There is no royal road to this heavy surf-fishing. With all the appliances for comfort experience can suggest, there is a certain amount of hard work to be done and exposure to be bourne as a part of the price of success." From "Striped Bass," Scribner's Magazine, 1881.