Here's my 2 cents.
I've run shocks with and without boots.  It really depends on the driving you do and where, and the care you take with your rig.
In rust belt states, you really want them.  It's the same reason car shocks have a shield.
The piston rods are chrome plated, not solid chrome.  When a rock, pebble or similar piece of debris is kicked up off the road and hits the shaft, it damages the chrome plating.  This exposes the steel shaft beneath to road salt and water.  Rust soon follows.  This has happened to several brands of shocks that I've used.
When I had the 5" combo on my Sammy, I used the boots and even with NY winters, no rust.  My DTs on the current suspension are pitted and rusty (no boots).
On my GV, I run boots. No rust.
Now for Utah rock crawlers, they are a waste of plastic IMHO.  Bad for mudders as they hold the mud in.
If you wash you rig after you wheel, it's no biggy.