I have access to a number of species as well as a shop right now and could make up some signs, along with some blanks for later use. We have Black Locust, Cherry,
Ash, Pine, Maple, and Birch on hand.
It would be interesting to have 2 or 3 different species all together, maybe Locust, Cherry (also pretty rot resistant), and then Pine or Fir from the
project. Then when people come 10, 20, 50 years down the road they can observe how each of the different species has held up.