obviously boondocking means many things to many folks, depends on what you want/need to to do. I can run easily a long weekend on 1 deepcycle. we do not watch tv or many of those indoor activities. Keep the fridge on line, add a couple of lights to go to bed by. but we're outdoorsy folk. Try it out with what you have, use your water and electrical with moderation, take it all in stride, not the end of the world if you run out of either.
3500 Ram 6.7 Cummins
Fuzion 325 Toy Hauler