Re: freezing disabled mom needs help
The Salem is a Forest River product. By 1998 the furnace is probably not one with a pilot light but rather one with direct ignition, as Ken suggested. Look at the thermostat. There may well be an on/off switch or one to select cool/off/heat and there is the lever to set the temperature. If everything is working properly, set the switch either to on, or to heat. Then push the lever to the preferred temperature.
Very likely your stove will have to lighted with a match or lighter. Most of them still do. But I would not recommend that you use the stove top to provide heat.
One more thing. If you were to tell people where you are, there might even be someone close enough to be able to help. There are hundreds of KOA RV parks.