Andersen levelers. Love them. So easy to level and chock. You just drive up on them, the further you go the higher that side of the trailer gets. When the trailer is level, insert the chocks.
If you buy the Ultimate kit like I did you get a trailer jack for tandem axles, stabilizer pads and a nice step to wipe your shoes off before you climb your entry ladder. Used the jack once, super easy. Just drive onto it with one tire and the tire on the other axle lifts off the ground. Not cheap but worth it.