My understanding was that all red cedar was aromatic but perhaps not. The red cedar I've worked with made my shop smell like a hamster cage I just built a cabinet from oak plywood and went with end grain butt joints. The wood sat in my obscenely humid shop for a couple weeks and had cupped slightly. Without long enough clamps and my coolers overflowing I just screwed it in with a seperation of about 1.5-2 in b/t screws. I lined the inner joints with silicone aquarium caulk and it's been holding steady @ 65% for a couple weeks. I'm lining it with luan this weekend. I would have gone with spanish cedar but the dimensions, 4ft tall X 3ft wide X 2ft deep, made that rather pricey. Mine is hiding in a closet so aesthetics were rather low on the list. If you have the skill and tools, I'd go with dovetails or mortise and tenon of some sort if you stick with the mitered joints.