I missed the "my trailer" part of your original posting.
Well with that said. I agree about the full size truck thing. I would recommend something with at least a 9000lb + tow rating. As others stated, you will be at 6000-7000 lbs before you know it. You also want to look at the tongue weight of the trailer and add some weight to those numbers and then go from there also. You can't go wrong with a 3/4 ton truck. We bought a brand new supercrew f250 gasser back in 2010 for $32,000 the sticker was over $40,000. They gave us almost $26,000 for it when we traded in 3 years later. I was happy with that deal. Supercrew F150's were costing about the same as the F250 i got. Of course their gas mileage was better, lol.