Do you use a cargo trailer?

I have a 7x16 I put my golfcart and four wheeler in. My friend pulls a 8.5x24 that he puts his small suv, and his atv in. He also carrys his small fishing boat and motor inside. He also mounted 600 watts of solar on the roof, with batteries inside. He hooks it to the rv for extra boondocking capability. Depending on what you want to bring, I definetly would recommend a tandem axle. More tires, but safer if a tire ever blows. Two 3500 lb axles are a good start. If you are going to go big time like my friend, I would suggest two 5000 lb axles. Cheers