Please Help for Minnesota Winter

Hi there...I am a virgin camper and I need your help.

I want to use my 2013, 16 foot Bambi for hunting deer in northern Minnesota, November 8 thru November 16. Average daytime temps are 32 to 38. I have a 30 X 90 foot metal building on a concrete slab that I have my camper parked in.

Here are my questions:

Would you use the gas furnace and water heater inside the building with a ceiling fan going and an open roof vent the length of the building? Do you think it would be safe enough? By keeping it in the building there would be much less chance of a freeze up.

I wanted to be able to shower with hot water and use the toilet.



My other option would be to winterize the water system and drain the water heater. Use bottled water to flush the toilet and pour antifreeze in the toilet and the sink trap.

Then I would use a small electric heater for heat.

Please advise...with any suggestions or comments...

Thanks