A buddy of mine used a sheet metal stove for at least 10 years and this was for at least 3 weeks every year. The thing worked great. A little dirt in the bottom and some decent wood and you'll be good to go.
Bring the stove, your dad will enjoy the heat. Heck, he will probably take control of the whole stove operation and keep things plenty warm. I know my Dad enjoyed being "Stove Boss"
That mirrors my experience. One trick I have used is to make sure your partner has lots of liquid just before bedtime, so he can rustle the stove when he gets up in the night to pee!
