Your Bounder has frame extensions, installed by Fleetwood. The extensions are of lesser material and are usually welded pooply. Do NOT exceed Fleetwood's towing limitations without beefing up the frame extensions and welds. The transmissions in those old P32 MHs are problematic and will not tolerate extra loads very well.
All your storage bays, with water in them, are heated by the front furnace. Problem being, Fleetwood did a poor job on the return air. You are probably good to the lower 20s. If you are going to be in a campground in the cold, add a 100 watt light bulb to the two bays with the tanks in them. I modified the return airs on my 33 ft bounder and have survive -7°F.
Richard
