Right now, I'm in Ohio, staying at a Holiday Inn just off I-80/90, with the Prius parked around back. That way, I can plug in to an outlet on the building without the cord crossing the sidewalk or otherwise being in the way.
Ms. Sunshine said I could. Besides being the night clerk, she is also the manager on duty, and said it was OK. Yes, Sunshine is her real name... I asked.
More details at
http://300mpg.org/2012/09/14/eco-road-trip-begins/