I don't think I know the best way,Very humid here. I only build Fiberglass bows. I used to keep anything less than 5 ft long in a spare room in my Air conditioned house. I now keep everything on shelves or racks in my shop..the shop is well insulated and I keep the air conditioner on 78 degrees when I'm not working.. I run a dehumidifier every time I spray finish. I spot check blocks and boards every 2-3 weeks with a moisture meter, no problems so far...20 years ago I built a handful of self bows I stored staves in a Insulated plywood box with a light bulb and small fan