I don’t really have a maintenance schedule either. Even though some would say the climate is more extreme, my TC seems to like Western Montana better than Western Washington. Other than snow, there’s probably less chance for water intrusion, too.
I take a look at different parts every so often. But if I like to work on it when it’s off the truck. Your post reminds me that I need to adjust the pressure cutoff on the water pump. On our last trip, it would intermittently pump even though I knew there wasn’t a leak. Simple fix of turning the pump off which we usually do anyway, but I figure I’ll fix it before it runs extra. I might also change the way it mounts to make it more quiet.