Thank you all for your advice! We ended up taking it back to an airport location, as recommended, which was pretty seemless (also, absolutely deserted due to COVID19). They took the car back, no questions asked, but did have to charge us a drop fee ($125)... although the agent was able to waive some reservation extension fees we were going to get hit with.

We had rented from Dollar, and they were pretty terrible on the customer service, but we ended up returning to a Hertz counter (just the way it was set up), and they were professional and helpful!

TIL - you can pretty much return a car to any location, if needed!