Thanks, BR! Yes. As a local hostess/to-go person, I can tell you that we very much appreciate tips for all the reasons she's listed above. You don't have to go nuts--we do get paid more than waiters do, generally.
But a couple of dollars is a nice way of saying, "Thanks for making sure that my order was correct, so I don't have to drive back up here when I get home and realize I got chicken instead of fish, and thanks for taking the time to anticipate my needs, so that I have all the condiments/dressings that I may want, to make sure this meal is as terrific at home as it would be in the restaurant."
The kitchen doesn't usually do those things. They just make sure your food gets cooked properly (which, in and of itself, is a big enough responsibility) so it's up to your to-go person to handle the rest. If not for us, you'd be walking out the door with a styrofoam box of food with no fixins!