I flipped my axles and added Dexter shocks to my 18CK. Picked up about 5" lift. I added Saveajack removable mounts for the rear stabilizer jacks. I simply slip the stabilizers into the mounts when I'm ready to use them. Lots of rear ground clearance. My trailer had very little waste plumbing hanging down, but had a skid guard welded under the dump connection just in case.
Travel on very rough desert roads ended up bending the axles and tires went FAST! Scary FAST! Got a pair of Alko 3" dia. tube 3500# axles made up to replace the 2 3/8" stock axles. They were cheaper and quicker to get than you would think. Allowed use of existing brakes, hubs & wheels on new axles. Picked up another 1 1/2" lift. If I do a flip again, I will probably upgrade the axles when I do it. Was a pain in the butt to redo a lot of the work a few months later.
I have subsequently added the Dexter Ez-Flex equalizers.
I don't notice much additional sway, but I tow mostly in California at 55 MPH. When outside of CA at 65 MPH it increases with wind but never had had problems with 18 wheelers. I use a Husky WD hitch but no stabilizer, and tow with a 2007 Tundra.I do think the extra height resulted in a slight hit on gas mileage.
All of the previous comments about extra height apply. I use a taller foot on my manual tongue jack, extra leggo's under the stabilizer jacks, and that first step can be a pain if parked on a hill with the door facing down. Had to be careful when setting up the hitch to get the ball/coupler high enough without the tailgate hitting them when it is opened.
What I can say for sure is I have never dragged anything in my travels! Some rigs I see are crazy close to the ground! Mine is very obviously the opposite. People notice it looks different right away.
Jim & JoAnne
2016 Toyota Tundra SR5 TRD Double Cab
2004 Starcraft 11RT (Replaced by)
2011 Eclipse Milan 18CK Travel Trailer