I have about 1 metre of hose from the tank outlet, through pump, upto hose reel, that's it. That 1 metre is lagged.
I drain it and cover everything with a duvet. I made a pump box so it's all enclosed. Pole comes indoors.
In severe weather, I use a camping heater for about 20mins, just to make sure everything is warm and supple.
Job done.