1. Correct! Let's agree to indigenous natives of the North West Coast. Don't get tricked by "modern" borders. Since few know them I'll give you the name. The native Kwakiutl tribe of Washington and Canada’s Vancouver Island.
2. Correct! Cedar is the tree. Not the same species as the Cedars of Lebanon, but the cedar of the Northwest coast. Abies Procera--Noble Fir. The tree is known to grow to 250 feet and dead straight.
3. Additional thoughts required.