It would be impossible to be charged for trespassing because both siblings are owners. On burglary, there must be a breaking into a building with intent to commit a crime, and you can't break into your own property. If there is any doubt, contact local law enforcement and run this by them. I would suggest you both establish boundaries so that everyone can live in peace. For what it is worth, occupying sibling should "lease" the other's portion and pay rent while in occupancy for the...
An attorney would need to look at your trust to prepare the deed properly. Maybe the attorney who prepared your trust could help. It shouldn't cost more than a few hundred dollars to have it done right.
I think you might not know the purpose of a lis pendens. It merely provides notice of anticipated or pending litigation and is filed in the real property records. It is merely a notice which is notarized and is recorded and serves no other purpose other than to provide constructive notice on record. On your other issues, my colleague offers excellent advice.
You can evict your friend. Be sure you give proper written notice and follow the instructions of the Washington eviction court. Many courts have instructions and sample forms at the filing desk or online.