Look, I'm resurrecting my own old thread. I found it while searching for something else.
After this trip, I swapped out the front EZ-rides and Gabriel shocks for ORD custom front leaves and Bilstein 5150 shocks. The stock rear springs remain. On the 2012 trip, there was no problem keeping up with the little rigs. Since then, I've wheeled with some little cruisers and such and they ask me to slow down on the trails. Also, the highway portion was much more pleasant. Other than bump stops, I haven't worked on any suspension changes since then. It works well for everything I do.
I've kept the same basic camping setup the whole time, but added a roof rack at some point to throw lawn chairs and such. It also holds a bow saw, high lift and other stuff I don't want inside. My rig is so big on the trails that I always end up with tons of brush up there every night. Everything on top gets beat but I haven't had any problems yet. I plan to get rid of the fiberglass pole style privacy tent for a "quick up", because that thing is one of the biggest hassles. I built a canopy that attaches to the rear of the roof rack. It rolls up and travels up there all the time. Then at camp it unrolls, unfolds and goes up on tent poles. It's a great concept to keep the tailgate and bed dry when it's open, but it doesn't stay up in high winds unless I can back up near some trees and tie everything to trees and the truck. Not super convenient, but still nice to have if it rains.
The electrical system has only changed slightly. Now I have 1 alternator for each battery. The isolator is still there because it would let me quickly jumper up a solution if one alternator goes out. Sadly it's a 90A rated unit and the alts are 105A. I figure I just have to keep the winch as a direct connect (not through the isolator) and things would be fine.
In theory the H1 OZ radials would have been a good choice, but they were never smooth enough for long highway travel (they aren't round). I did a couple long highway trips on 38" TSLs, which were worse, although they looked 10x cooler and wheeled better than anything. I've got a couple trips on Swamper SSRs now and while not perfect running, I can cruise at 70MPH with only slight vibration. For most of the wheeling I do, they work well. A TSL is a great tire like 10 hours a year for me and since the SSR works almost as well I'll stick with them for a while. The ultimate expedition tire is probably a 37 BFG or something.
If anybody is interested in details, my trip threads are in the Midwest section.