Question: too much camper - too little truck

Geewiz has some good suggestions, although even if one is not familiar enough with vehicles and campers to determine or understand payloads and weights, the internet will tell you the “rated” payload, so will the sticker and that a loaded 811 Eagle Cap is 4400lbs including 500lbs of personal gear. It will also tell you that the c o g is fine for a shortbed Superduty.

OP needs to get his truck fixed up to haul that thing, and after 10,000 miles that he’s lived to tell the tale about, it will drive like a dream comparatively once it’s setup right.