So, I finally got off my lazy butt and did something about my sagging springs. I decided to take my springs directly to deaver and have them add a couple leaves.
I went from a 7-leaf to a 9-leaf setup and so far so good... The extra leaves had a minimal impact on ride quality, but I gained a lot more load capacity. The guys at deaver did an excellent job too. I brought my springs to them (off the truck) and they had them back to me in about 2.5 hours all freshly painted and ready to go!
Here are a few pics of how its riding now, with a bit of weight (Can-Back, bike racks/basket, sleeping platform, Hi-Lift and some random tools...). I forgot to take a before pic, but it measured 1.5" lower in the back than in the front. Now I'm at 1.5" higher.
Anyway, thanks everyone for the advice,
Jake