Not a lot of information here, but if you have to put your Jeep ignition in the accessory position to tow, then yes, your battery will drain. You have two options- either install a battery disconnect switch or install a towed vehicle battery charger. Lots of posts on this forum on the subject- try the search function.
Good luck and welcome to irv2!
Walt & Bonnie
2006 Monaco Camelot 40PAQ, Cummins 400 ISL
'16 Ford C-Max, Roadmaster BP, Sterling towbar