Help with Cold Weather Mods

[jar3316]

I know its summer but I want to get started on the project list as soon as possible.

Its been my wife's life long dream to see the grand canyon in winter. So this December we are going to go for 7 days. Take the kids and do the train thing plus the polar express for the little one, an adventure none the less. The temps can get as low as -15 and our trailer has exposed tanks.

we have camped down to 28-30 F, the only discomfort was the water hose filter broke. I will fix that by buying a PIRIT heated water hose and skipping the filter. We use a electric heater to heat the trailer with the propane to back it up. I might also buy the A/C heat strip for the roof unit. and we will do the standard foil bubble wrap in the windows and I will cut vents into the compartments from the inside of the trailer for heat into the compartments. I will upgrade to two 30# propane tanks for the water heater (no electric heat) and cooking.

My main concern is the tanks. We do not plan on making this a habit but want to try it once or twice. Since they are exposed and they are 40gal tanks (fresh is 25 or 30) could I get away with anti freeze in the black, gray and in the fresh tank pulled up into the pump (then just use city water through heated hose). If so how much antifreeze are we talking about per tank.

I could put heaters on but the system I would use, if I do it (if I go to the work it would be whole hog), is around $1000 for all of it. Wasn't wanting to spend that much but will if I have to.

Any help would be greatly appreciated.