Always start with the basics. If your engine quit running you need to check to see if you have gas before replacing the engine. Load the Jeep and RV both up just like you would for a trip and drive them separately to the nearest truck scales that can weigh total weight and load on each axle. Weigh the RV by itself then hitch the Jeep and weigh it again. I would not be surprised if you do not see your front axle weight drop when you hook up the Jeep. Any front axle weight below 75% of its rating will cause handling issues. Alignments and adds are all good if the weights are right. Please repost and let us all know what you find out and what you do.
CAT scale locator