It depends how far below freezing it’s going to go and for how long. A few degrees should be ok. If it’s you going to be below 27° all night, we turn them off inside and open them up outside to drain the outside part.
Also, how tight your cabin is.. even if it’s unheated, it will be a little warmer inside.
In my opinion, because the unheated faces only 4-5 nights of “only” 25 to 30 deg freezing, and because daytime temps will be well above freezing, I recommend leaving every faucet dripping steadily for the period. Hot AND Cold, so the water heater has flow too.
If less than 25 deg F continously for 3 days or more? Absolutely. Cut off water outside the house, drain the pipes inside, drain the water heater.
Simple solution to turn off the water at the pump and open ALL faucets to drain the water so there is nothing to burst the pipe. I’d tun the water heat off just so something doesn’t burn the cabin down while no on is in residence. We did this on our second home.