I was recently involved with a project where the client wanted to use red oak timbers fresh sawn green. He wanted them planed and stained. He went out and bought a electric hand plane 3 1/2" wide blade and set the setting very shallow. He planned the timbers to remove the bandsaw sawmill blade marks. He then cut the joinery.
My suggestion to him was to cut the joinery first, using square rule joinery and then planning them, as it was my understanding that this was the industry standard for small shops that can't plane all sides true and square.
But anyway, he did it his way, and then he finished them with Tongue(spelling?) Oil as he wanted that nearly natural finish. They looked great when done. We installed them after they were dry.
If you do a search(use button at top of this page) and enter the word "oil" you'll get lots of info. Or use another search word for info such as stain.
Good luck with your project.
Jim Rogers