Be sure to use some sort of pad underneath the stabilizer jacks to spread out the weight load over a larger surface. Some folks use the plastic pads and others use wood. Personally, I got 2 treated 4"x4"x8's and cut them into 1' long pieces. Now I have 16 pieces that are very stable and are easy to handle. The 4x4s stack easily if you have to crib them to get your rig level.
2014 GMC Sierra 4x4 crew cab with 6.2L and max tow package
2015 Autumn Ridge 329BHU
2014 JayFlight Swift 264BH - SOLD!