Wes,Have you actually tried launching and retrieving on a slippery ramp?
I know the Rhino can move the boat around,slippery ramp may be another story,Good luck hope it works out.
We haven't with the LT kit or the Kings, but we did it at Blue Water with stock suspension. It was squatted down really badly in back, which lightened up the front end a bit.
The cool thing about the LT kit is it actually moves the rear axle back 2" and the front one forward 2". It increases the wheelbase enough to make a big difference.