The Road isn't bad if it is dry. If it is wet, it is classic gumbo, where your tires just get bigger until they won't turn anymore! When you first leave the takeout site, you head up a canyon where you are in and out of a creek bed. The trailer won't be an issue if you have the correct rig to pull it with.
My question is, today's water level is currently 700cfs, so your you planning on walking your boat down to Birch Creek?