Go lithium, battle born, LiFeP04 etc. I'd aim for at least one 200AH (and no you dont need to change anything) but you may want a solar set up to go with them for trickle charging and the ability to dry camp for as long as you want. Remember, a normal battery will get damaged when run down 50%, where, for example, a 200AH lithium is good for the full 200AH because its really a 240AH and saves the last 40AH to keep it from being damaged. There are many videos on the subject
There are guys running lithium + over 1500 watts of solar and they run the air conditioning and everything else right off solar, in direct sun the batteries don't even move!
