WA licensing inspection?

Howdy, I have my State Patrol inspection this Friday in Bellevue. Anyone gone through it recently? Got any hints about what they're going to be picky about? I plan on towing the trailer to the station, in blatant violation of the law, because I don't think I can get a trip permit for a trailer with no plate, registration, or VIN, and I know I can't afford to rent a flatbed. I have working taillights, turn signals, and brake lights, and a couple of random reflectors. I don't have any receipts to speak of, because the vast majority of this build was done with scavenged materials, so I understand that I may have to settle for a 3-year probationary title. If I forget something, or fail the inspection for whatever reason, will I have to schedule and pay for a whole new one, or is there an easier way to get signed off if it doesn't happen the first time?
Not a lot of specific questions, just looking for any relevant advice.
Thanks, Andy
Not a lot of specific questions, just looking for any relevant advice.
Thanks, Andy