This may be too late for imjin, but in case any others are considering a pop-up camper...
Four Wheel Campers make several models that will fit any truck. We have the Hawk model on our 2000 Tundra. We chose it for a couple of reasons. One is the weight. They are light enough that no suspension mods are necessary. The other is their off-road ability. Other pop-ups are made with wooden frames. FWC are made with a welded aluminum frame that can take the torque of off roading. The earlier Turtle Expeditions used these campers.
The original owner of FWC is now building similar campers called All Terrain Campers. You can find enthusiasts of both of these campers in the forum section of
Wander The West. You will see that the enthusiasm of the owners of these campers is similar to that of Tundra owners and their trucks.
If you want more amenities and intend to only drive on smooth roads, then a pop-up like the Phoenix will give you more bang for your buck. But if you like to explore and wilderness camp 50 miles from the nearest paved road, these campers are your only real choices. And no, I am not affiliated in any way with either company.