Airbags or WD hitch? opinions advice...

I always aired up the bags first. Get a base line measurement. Center of fender well over front and rear wheels. Air up the bags. Me thinks you'll be using the Air lift 5000's which can take 100 PSI. I'd try 40 psi to start. Drop the ball on your hitch and see how far it drops down in the rear. I'd suspect much less than before. Then get your WHD set up. Once properly set up your front end and rear end measured at the fender wells should be close to what you had as a base line. Make sure your trailer sits level or as close to level as you can muster. Make sure your WDH bars at where the directions say they should be. On mine they want to be parallel to the ground. Your application may be different. Test drive the rig. If the rear feels way too stiff lower some pressure out. If it seems to want to squat real bad when you hit bumps you may want more air. It takes time to fine tune these hitches. Many times you'll need to change the angle of your hitch head where the bars are hooked in to get it set just right. Some have this adjustment and some don't. Once you decide what WDH you want spend some time on You Tube and watch how to set your particular model up. I actually find YouTube real helpful for this sort of thing.