Do you think this wall is load bearing?
You're worrying too much. Let the SE look at the structural system, and he will know what to look for. It will be more a case of him asking you questions, so don't fret. What I see as strange is the middle truss having vertical wall studs, which usually indicates the wall below would be load bearing. However, it's probably a gable truss to take the drywall part in the raked ceiling spac, and therefore, the wall below can be non load bearing. The other trusses that span outside wall to outside wall can have any wall beneath and preferabbly, the bottom chords are independent of walls below. That's how trusses are supposed to work. The gabled truss could have been replaced by the same truss type seen in the photos, and walls would be non load bearing underneath. What else is puzzling is the corner built up post. Since it's quite substantial, it appears to have no purpose, unless there was meant to be a hotwater service tank in the ceiling space above this wall. The way its built suggests the wall is load bearing. Or it could simply be a carpenter-framer used to corner studs being massive maybe to take a beam to span the opening, not realizing the roof is trussed.
Cheers from Oz