well, previous topic dealt with my house batteries. turned out old ones were dead. replaced both, all was well. So day before heading out for Oregon i do some prep. began by retracting leveling jacks ...
When you say nothing works do you really mean nothing ? Or is it just certain things ? Does it even try to start or make a noise ? Headlights work ? Grounds are often the problem , I would look at the battery ground cables .
When the engine died were you doing any thing like trying to start he gen ?