X2 on what he said. Max trailer weight has to be under 2000lbs, and have a tongue weight of less than 200lbs.
Your popup exceeds both of those weight ratings, and a hard sided travel trailer is way out of the ball park.
Just like the guys that pull a boat to the marina or lake, sure the YJ will drag it, but do it safely? Not. A little aluminum jonn boat, or a utility trailer? sure go for it. A travel trailer, or even your popup? Get a proper tow vehicle.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...