That's fair. But at the same time, lots of places might not even run that extension cord to allow 120V charging. :dunno:
It depends what type of extension cord it is. A Chevy Volt can use a 20-gauge 100 ft cord and have zero issues but a Tesla in this weather almost requires a 12-gauge (25 ft) or 10-gauge (50 ft) cord to even survive at a 3 mi/hr charging rate. I doubt the Hotel has a 50 Amp RV / Heavy Duty extension cord but maybe they do. I have my own 10-gauge 50 ft cord so I can be self-sufficient.