We have a 3 hr drive to Eugene on Sat (new forecast 112deg) so may be pulling over often.
I think the reason for not needing to use the bathroom at night is I am still in a horizontal position not moving around.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT