Depending on certain day-of conditions, such as unpredictable traffic patterns, you may be required to do a mid trip supercharging stop. Your Tesloop Concierge, who is able to monitor the vehicle remotely, will communicate this to you well in advance.
Tesla has created this helpful 30 second video on how to charge the vehicle. You can also open the charge port from the display screen in the Tesla.
Be aware of the charging time, as Tesla charges idle fees for leaving the vehicle plugged into a charger after the vehicle has charged to its limit. You will be billed for any idle fees incurred during your rental period.