The bottom line, Chris, is for you to find out for yourself what the knife laws are in Washington state and the localities you frequent, and then scrupulously comply with those laws. Everything else is just tapdancing, because no one in this thread will be there to hold your hand when Officer Hardbody wants to pat you down and bust your chops.
Recognize also that there is a good deal of subjectivity built into the legal system in those areas where the legislature has not acted. For example, there are about 3 different ways to measure blade length (cutting length, exposed length, and tip to tang), and if the legislature has not defined how to measure a knife - which they probably haven't - then the subjectivity of the police, prosecutor and judge comes into play. Thats why its often difficult or impossible to get a straight answer from a bunch of goofballs (like me) on the internet. Does my knife have a 3.5" blade? Depends on who you ask and what kind of mood they are in.
Were I to give counsel, it would be to develop an intimate knowledge of the laws affecting you, comply with those laws without exception, have the courage of a lion when exercising your rights within the law, err on the side of caution and compliance in the gray areas, and be as deferential as a Catholic school girl when engaging the police. If you are nicey nice to the police and they never bust your chops to begin with, then it doesn't really matter what blade you are carrying. Just my view of the world.
:thumbup: