I have had my 2417 out a couple weekends when it was cold. Normally down to about 20° overnight, but one night down to 9°.
The only problem I had was opening my gray-tank drain valve. It was frozen. I towed for a while with the sun on that side, then was able to open it to drain.
Don't know where your water tank is, but mine is in the rear storage area, so it gets less heat from the living quarters than if you have yours under the couch bench. Also, if your fill spout is next to your outdoor shower (both assumptions), you could run hot water into your fresh tank each evening before retiring, to give it more heat before the cold of night.
If temps will be above freezing each day, and overnight lows are in the 20s, I don't think you will have a problem. Open the cabinets where water lines run through, and you will let even more heat access the lines.
Good luck!
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