Although I havent used it yet, I just got the collapsable cart from Cabelas.
It is well made and seems pretty sturdy and it will do its job.
It does break down to fit inside of your truck. But I found it easier to keep the wheels separate from the cart in order to make it easier to put together.
Once you get use to it, you can assemble it in about 2-3 minutes.
The only thing I dont like it that the tires STINK really bad. They smell like kerosene only 100 times stronger. I have had mine setting outside for a few weeks now and although the smell has diminished, it is still there. There is no way I am going to leave those things inside my truck.