I checked out a new Colorado ZR2 today in the parking lot at work and before I read this I came away thinking it reminded me of the Hummer truck H3 thing.
Regarding the OP's concern: what exactly do you need to "build" an expo rig? Almost any vehicle in stock form is quite capable of handling the car camping duties you're going to throw at it. It has 4wd? Great! You can go car camping in the dirt!
On the trails here in CO, everyone has a built up JK or TJ or LJ or...... to be honest, I don't know the difference. They all look the same. If you like owning a car with so much aftermarket support that you can get stickers of trails that you may or may not have driven that cover your hood- then buy a JK. Otherwise, put some gas in the tank (not vehicle specific), load up the car (not vehicle specific), plan a trip and go. Give me a list of vehicle specific items that you NEED in order to car camping. Air compressor, frig/cooler, awning, tent, lights, stove, chairs, radios, navigation...... none of that is vehicle specific.