Hi Bryan,
that's a great introduction. I understand that you don't want to fiddle with PS, but some basic adjustments can be very useful - i.e. contrast and cropping. There is no "just-so-out-of-scanner" picture and - once used to the process - the postprocessing f.e. of the 2 Portra400 pics would only take a minute or two. How can the lab know how your pictures shall look like? You are the photographer and you should have the control imho. Your fine pictures are worth this minor effort. If I could afford it, I would have scanned all my good pictures by a professional scan service, but would never leave the final look to somebody else. Just my 2 cents.
Best - Reinhold