For every person that's has one go wrong, plenty have them that give no issues.
So far that has been my good fortune. I bought mine 3 yrs ago w/ 93,000 on it (05 w/ HD package). So far, so good, currently at just over 133,000mi. The vehicle had good, thorough records. I've done maintenance and had to replace a few things, but nothing terrible.
Re EAS suspension: I had a problem with one of the front air shocks - a slow leak when cornering with symptom of loud whistle, but the compressor could keep up with, so I could drive it for a week until parts arrived. I'm more comfortable wrenching on bikes than vehicles, but there are good resources online, and I did the job myself (both front airbags/shocks for under $500 in parts).
I have the older Hitachi compressor, but I did the rebuild kit (more like $40 kit when I bought it), and it's running fine.
It's easy to change fluids for differentials and transfer case (done it 3x on assumption that the initial change was the first).
The only immediate upgrades I'd suggest are 18-in wheels (if you get one with 19s on), good all-terrain tires, and that IID tool. As a computer guy, this will be right up your alley.
For your quick camping trips, the killer feature is the fold-flat rear section. You can fold the both rows of back seats completely flat, quickly and easily. The width and length accommodate a double air mattress, and you have flat, dry sleeping. With the glass roof sections and lots of side glass, it's very nice. You'd want some of those magnetic screens to keep the mosquitoes away in CA.