It doesn't matter how we interpret it but rather how the federal courts where such cases would be heard interpret it. Care to guess how they interpret it?
Yup, you guessed it. You do NOT want to be another test case as you will lose.
There is another thread running around OCDO about carry in post offices which have yet another set of rules that seem to allow lawful carry but the courts found otherwise.
Perhaps with incorporation and a few more supreme court rulings that are favorable we can actually have the full second amendment but until then, be thankful that Oregon is one of the more gun friendly states. Just take a look at what the open carry folks in California have to go through. Unloaded, stay away from schools by 1000 feet, law enforcement can check unloaded condition (and routinely do) anywhere, unlawful search (i.e. running serial numbers of weapons, running ID's if surrendered, etc.), long detentions while running said numbers, veiled and not so veiled threats, and in many jurisdictions an impossible to get concealed license.
With the exception of a few cities here in Oregon, even an unlicensed (CHL) carrier doesn't have to deal with the majority of that garbage and basically anyonethatcanlawfully buy a gun can get a CHL.