My initial reaction was, "Oh, these are too heavy to be carried on and off stage." But the beautiful surface pieces (minus the structural 2x4's) were perfect. 3x1? 3x1/2? Whatever.
I took two pallets apart and built a 3 foot by 2-foot pallet wood sign with a "kickstand" on the back so it could stand alone. Then I sanded it so it could better take the lettering, and white-washed it with watered down white paint to make it look more like driftwood.