For boondocking with a "C", I'd look into a few things:
1: Check your converter. Chuck it if it is a single stage model. If it is, chuck it. A couple C-notes gets you a five-stage "charge wizard" converter. If you are willing to pay more, you can get a converter/inverter like Magnum Energy's MMS (50 amp, four stage converter, 1000 watt, pure sine wave inverter.) This is the first thing someone should do. In fact, when I buy my next MH, this will be done by the local dealer.
2: Consider a solar system. A class "C" can handle at least 100-200 watts of solar, perhaps a lot more. Add a MPPT controller that does multi-stages, and that will allow much longer boondocking trips without the need of constant generator running.
3: If you want a way to maintain a battery, Battery Minder sells an 8 amp multi-stage maintainer with a desulfate mode that can be permanently installed by the batteries. This can come in handy if you have a very low wattage connection, or are using a very long extension cord when you have the motorhome in storage (and plugging into the charger may overload things.)
4: Depending on batteries, sometimes you can run the onboard charger and an external charger. However, this depends on the type of batteries. AGMs may be able to handle this better than flooded cel.
