I asked these same questions a couple years ago. I ended up buying a 23' trailer and with my gear in it is right at 5000#. I put air bag suspension and trans cooler. After towing it for a few years.....I wouldn't recommend it. The truck will tow it but it works very hard on the hills. Also, if you ever get in a situation...the tail will be wagging the dog. Either buy a smaller unit or a bigger truck.
Good luck.