Oh great,. 15 answers to the topic. Got to be some intelligent well considered advice in that lot.

Jeez, what was I thinking???
Anyway, dug around in the garage and found some hose fittings, a pressure gauge, and a hand operated wine bottle vaccuum pump. I plan to put a light vaccuum on the board, and then let it refill with dehumidified air from a small super airconditioned room.
Board lady says to drill a hole in each end of the board, and pass air through the board non-stop for several weeks with a fish tank air pump. I'll give that a go in April if plan 'A' does not work out.