To protect or hide the interior when parking, I have the "shower cap" i.e. rain protector. Mine is the Walker St Clair version. It is designed to go over the erected hood but fits perfectly well over the open cockpit and takes only two minutes to fit, held in place by bungee cords. Much easier than putting the hood up - even though mine is the "easy-up" hood.

Driving in winter I find the heater is powerful (2005 car) and I also have heated seats (Allon-White), and I always have side screens on - so I don't use the tonneau at all and wouldn't even order one if I was buying new.