You seem to be on the right track. Keep in mind 135 carrying passengers for hire under ifr requires an autopilot or second pilot, vfr does not. You can log pic whichever seat you are sitting in, but many insurance policies require a checked out 135 pilot in the left seat.
Under 91 only 1 pilot can log unless the other is a cfi or someone is under the hood or the aircraft itself requires 2 pilots. The company or its pilots may not be enthusiastic about this. I haven't flown 135 in over 5 years so I am not up on the reg changes since then though I don't think these type of things have changed.