I don't understand what you're asking.
You want to haul a 800lb Lang, had to look it up, 800lb BBQ for camping...... and? Something else at the same time?
Want to use the pickup?
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold