Hi 2nd A, and welcome to OCDO!
Oregon's pretty simple when it comes to OC, but there's a few sticky parts. Let me preface this by saying I Am Not A Lawyer, and you need to read the laws for yourself and understand them. Consult a real lawyer if necessary
Almost all the state laws regarding firearms are here:
Basically, my interpretation of Oregon law is that it's OK to loaded OC anywhere without a CHL except "public buildings" (which includes hospitals, any local or state gov't buildings, all public and private schools and colleges). Having an Oregon CHL exempts you from those restrictions (except for some courts).
However, cities/counties may ban LOADEDfirearms in public places for those without a CHL, and about 7 of them have done so. you can still OC, it just must be unloaded, and the definition of "unloaded" varies by city Some of them you can't even have a loaded magazine on your person...
Here's the thread with the breakdown of cities banning loaded OC without a CHL.
It's possible to get a non-residentOregon CHL only if you live in a bordering state, and the Sheriff in the county you apply in chooses to let you have one. Utah doesn't border Oregon, so no luck there.
There was a bill introduced last legislative session (2007) for CHL reciprocity, but it never made it out of the Judiciary committee. Let's hope it gets introduced again and actually gets somewhere this session.
Hope ifI didn't answer your questions, the links do.