I use a set of 3 leveling blocks for my 3 axle using 2x6 boards with 45 degree cuts on one end, make the bottom board length so it will fit between the tires, then make the upper board half the length of the bottom one. butt the square ends with the short board on top of the long one and screw them together. you now have three light weight leveling boards that will give you either 1 1/2" or 3" of lift depending on how far you pull up on them, place them either in front or behind the 3 tires depending on whether you are backing up on or pulling forward to level and if you need only part of the distance to raise you only use one or two of the blocks to customize your height. Simple and cheap and easy to make and doesn't take up much room either. For you big tire guy's use 2x8's.
2016 Silver Ram 3500 CC Dually, 2011 HitchHiker DA 349 RSB, 2014 Wrangler unlimited Rubicon