I just use Tesla's destination charger map and that usually works. And in many cases, at least in colder parts of the country the hotel might have access to engine block heater outlets. These are good enough to trickle charge overnight and save some time in the morning.

Unfortunately I've that you can't rely on the chargers being available at most hotels. In my experience they're frequently either ICE-ed (the charging spot is taken by a non-EV car), or there's already another car charging.

There is one problem coming: people fighting over chargers. I was in a Target parking lot with two people fighting over who got to the charger first. Fortunately the mall 5 miles away has a Tesla outlet and a dozen underground charging slots.