If your going to pull a fairly good sized trailer, I would get at least a 3/4 ton truck. You won't be sorry.
Also if your going to buy a truck, I would buy a diesel truck for a number of reasons. Better pulling power, better fuel mileage, better resale value, longer life.
A new diesel 3/4 or 1 ton truck can be pricey.
You could buy a decent two or three year old diesel truck for a lot less money, if you don't want to shell out for a new one.
I purchased my current 1 ton diesel 2 years old, with only 10k miles, for HALF the cost of a new one.
Most diesels are built to go at least 300K miles with no problem. So, if a vehicle is clean and has service records, don't let say, 50k miles scare you off.
One exception, I would avoid the 6.0 liter Ford engine. JMO
Good luck and happy camping. Trace