One caution the leveling kit lifted the front so now the usual settling of the springs make the rear look lower. If you add bags that will stop the droop, but it does it by not letting the spring naturally settle. By installing the bags it stops the natural settle but it really stiffens the ride. If you install a taller lift block in the rear then it still allows the springs to settle a little and keep ride quality. The actual best would be a lift block to help height and bags for capacity but thats $
I dont know if that made sense but I just went thru this with my bro-inlaw. He added just bags but when he aired up to keep rear end up it was a really stiff ride. So he installed a larger rear block then, kept his air pressure lower. I am no mechanic or suspension expert by any means at all that was just an experience I had.