Byron, The wasp that you describe is indeed a Mud Dauber. I don't think that they will use the pine boards with drilled holes. They like to put their nests in out of the way places, under eaves, chimneys, dryer exhaust vents, garden equipment (especially around motors), mufflers, etc. There are several kinds of Mud Daubers. Some build parallel tubes, some build nests more like lumps, some have rough surfaces, some smooth. They are very beneficial to have around the garden. Mud Daubers use larvae, spiders, and other soft bodied insects as food for their offspring when the eggs hatch. The nests can be a nuisance depending on where it is built. We lost a fan for the hood vent over the stove. Mama Mud Dauber thought that the exhaust tube made a great place to build. The speed of the fan blades was interfered with by the nest causing the fan motor to short out. Have you heard the buzzing sound the Mud Dauber makes when she is attaching each little ball to the incomplete nest? Allen Bastrop Co., SE Central Tx. Zone 8