Jeeps can pull along quite a bit thanks to those lovely little in line 6s. The problem youre going to run in to is trying to stop. My father regularly pulls around a large camper with his 98 sahara edition, but he has had an issue once or twice with the brakes locking up. Dodge makes some pretty crappy stop hardware, so make sure everything is in good working order before towing anything.

But still, I wouldnt go much over that tow limit. Also, that lift might kill clearances for the back of the trailer which could cause significant damage, not to mention having that hitch higher makes towing more of a hassel.