So the planks have been drying in my living room, decided today to start putting them together. I've never done this before so I knew going in there would be a learning curve. I started off with drilling the holes for the dowel rods.
Next I ran them through the table saw to create a ship lap joint.
The center piece has two joints,
the outside pieces have one and a raw edge.
Gluing in the dowel rods to the center piece.
Mounted the center to one of the outside pieces, then ran out of glue. Getting to be late afternoon by now anyway, set up some clamps to keep it flat overnight. I'll run to the glue store in the morning and do the other side. Time for a beer!