tstege, nice work. Could you tell me more about your experience with the propane heater - do you use it while occupying, ventilation while using, how do you have it hung, etc. I was thinking going this route but considering using it just for taking the chill off the camper before occupying. Also, what is the fan and did you install it? What does the cover/top look like and how long can you run before zapping the battery - is your battery a stand alone or set up with isolator or ? BTW, your battery setup looks clean - nice work.