Plan to travel light as you only have 700lb of cargo capacity after loading the toy.
Don't forget some basic stuff counts against your payload:
- 2 - 30# propane tanks - 110#
- 1 battery at 50lb
- 20gal of water (not full - enough to do a bathroom stop), 150lbs
That leaves you with only 400lb to cover food, drink, clothes, camp chairs, etc...you would be surprised how fast it adds up.
Also, what is the truck specs? Toy haulers tend to be hitch heavy (not a bad thing). A lot of 1/2 ton trucks have pretty pitiful payload capacities and he hitch weight counts against that. We have a similar size only loaded to 6900lb (scaled weight) an the hitch weight is north of 900lb.