I dont pull gooseneck at all. I pull a 20ft enclosed trailer loaded full of equipment pretty regularly, no problem. I would like to add a set of air bags on the rear just in case.
As far as my setup. Its a ICON 4.5" kit. I also added 1" TEI spacers on the front and then just recently upgraded to the 4-link kit. As far as the rear, instead of using the blocks that came with the 4.5" kit I upgraded to the full replacement ICON 5" Leaf Springs. I also added the 1" rear blocks when I added the TEI spacers to the front. Oh and I also added ICON reservoir shocks on the rear as well as a Hellwig 1 1/4" rear sway bar.