Douglas fir is the wood of choice for the laminated structures in a cold-mold boat. It has excellent properties of:
Certainly other woods of similar properties can be used. One of our builders is very successfully using cypress.
Make sure that any wood you use has been properly dried to its equalibrium level. You can Google™ to determine a wood's moisture equalibrium. We bring this up because cypress, for example, is often not sufficiently dried.