Did you add or beef up the sway bar?
Add in air bags?
Explorer springs, I have added the smallest/most common swaybar (93+, same as what gump went all over the country with when he had the camper) but I haven't had the camper in the truck yet post sway bar. My truck didn't originally have one in the rear and while sketchy at first it wasn't bad once I got the hang of it with the camper.
First and I think second gen Rangers had a 3/4" rear sway bar, whenever the cutoff was and newer got a 5/8" swaybar. 2wd Bronco II's had a 1".
I thought I would try the 5/8" since the bed was off the donor and see if I could get by with that maybe not totally hose my articulation when playing offroader without the camper.
The truck seemed to carry the base camper ok, I can cheat on the luggage side since a standard cab Ranger playing family camper doesn't have enough seats and will require a support vehicle anyway.