Battery Recovery

Assuming that you have the "standard" batteries that come with a Trailmanor, how long does it take to deplete them using them to run the refrigerator, heater at night, and minimal lights/water pump. Can the tow vehicle recharge the battery in 5 or 6 hours of driving? Will one night with shore power recharge them? How many have a generator and why? In short what do you need to do to make sure the heat will work that night while boondocking.