First things first, I'm glad to see another Oregonian!
After doing alot of research into this myself for the carrying of a larger fixed blade here in Oregon, what I came up with is this: the "pocket knife" basically only counts as a SAK or a Peanut. Anything else is considered a knife and doesn't fall under the "ordinary pocket knife" rule. As such, I carry my SAK in the little coin pouch on my jeans, or if I'm working, in my pocket, where it's legal.
As far as fixed blades are concerned (and I don't have the rest of the law sitting in front of me at the moment), I believe as long as part of the knife is clearly showing, aka obvious that you are carrying a knife, or it's in a clearly indicated sheath on your belt, you're ok. I know I have a smaller fixed blade similar to the size of the Izula 2 you're speaking of. Unfortunately, I find that it's almost a little too small to carry around in the winter because if I wear it on my belt, near the buckle and put on a hoodie or my jacket, it gets covered (concealed). As a result, I carry my 5.5" cutting surface blade on my right (strong side) hip in a horizontal position with the edge down. It took me some time to figure out where the custom sheath I had made for it would be the most comfortable for sitting and moving, but I did find it and what's nice is that I just lift my hoodie and tuck it behind the sheath and it doesn't have any chance of being concealed.
Just as a word of caution here in Oregon. If you carry your knife the way I do, which is painfully obvious, expect to get a few looks. Personally, I don't really mind and I'm generally a nice guy, so I'm not running around scowling at everyone for looking at my knife. My larger fixed that I'm speaking of is for SD, so I have a response ready for anyone who feels the need to come up and ask why I'm carrying a knife (no one has done this yet by the way). I just tell them it's my alternative to carrying a firearm.
Also, I believe that carrying it in a pack is considered concealed. The way I think of conceaed vs. non-concealed is basically that I don't want to leave ANY doubt in a police officer's mind that it's open carry. If you carry it in a place that you feel you'd have to argue "but it's not concealed!", you should probably put it somewhere else.
