The two places I go for boatbuilding wood are Crosscut up in industrial NW (http://www.crosscutportland.com/) and Woodcrafters at NE 6th and Davis, just across the river from downtown (https://www.woodcrafters.us/). I haven’t been in looking for laser fodder, but they both have a huge variety of species.
While in Portland you should also check out a place called Scrap PDX (1736 SW Alder St) scrappdx.org a great source of who knows what you’ll find but is always an adventure and inspiring. I’ve scored woods, leathers, acrylics, paper, memory foam… check it out.