Do you have a scale? Choose a board you can weigh, mark the weight on
it, and weigh it again now and then. When that board stops loosing
water weight, it is dried to the climate it is in. You'll notice most
of the water dries out in the first few weeks. The wood does not have
to be perfectly dry to use, unless you're jointing up table tops or
other panels out of it. Wide, flat sawn boards will cup the worst. Keep
in mind the wood will shrink ACROSS the grain, not along the grain,
when determining fastening techniques.