What is the maximum payload (cargo) capacity of your truck? That information can be found by checking the white with yellow label on the driver's door.
As you've discovered, campers tend to be very heavy and 1/2 ton pickups are limited in their max payload capacity. The typical max is probably around 1,300 lbs. But, each individual pickup has a specific payload capacity depending on installed options or package. The Lance 650 has a gross vehicle weight rating (GVWR) of over 2,000 lbs. And, after adding the weight of passengers, camping gear, tool box, etc. which make it even more over max payload capacity.
Even a lightweight popup camper is likely to have a GVWR of a 1,000 or more. Even the Raven popup camper will have a GVWR of over 1,000 lbs. And, you'll notice that the Raven company only gives the dry (NOT GROSS) weight of 850 lbs. But, by the time you add propane tanks, partially filled water tank, options, etc. it will have a GVWR of a 1,000 lbs or more.
One option is to get a 2500 or 3500 Ram or similar Chevy/Ford. Another option is to get a small travel trailer. If you want to camper to go be able to go further in the back country, there are a number of single axle travel trailers that will work.