If you don't already have led lighting , changing to led bulbs is a big energy saver . Could get a little costly if you buy quality retro fit bulbs and do all your lights . The Addition of battery up grades and solar panels as others have already mentioned. You will need to learn to ration your water supply or have a way to replenish, I have a bait well pump set up to pump from water jugs into my fresh water tank. I do have two Honda generators but we don't use them very often since we have invested In solar. If you do end up with a generator please invest in a quality quite one and use common sense when camping near others.