I like dual axle setups. Usually flat bed, so you can haul other things if need be (furniture,dirt,wood, whatever) as many tie down points as you can get. Also, for those unforseen time when you may not be able to get the car up there, a winch is rad. I also like to have trailers with a bit lower ride height, it makes it easier to load and unload a low Z.
HTH
Kenny