Starting Point recommendations Bunk House 5er MFG and Models

Above poster is correct a 16,000 lb gvwr fiver will have a pin weight when loaded at least 3000. This is too much for your one ton SRW.
I would be looking at a fiver with gvwr under 13k. Don't forget to figure weight you will load for passengers, gear and hitch in the truck. Could be 500 lbs or more. Add in a 2600 lb pin (based on 13k fiver) and you are at your trucks gvwr.