They run fine, when properly adjusted. We were running carbs on all those trails before FI vehicles got here. That's the engine I have in my CJ, and it's more than capable.
That said, you may want different needles in your carb for altitude, especially if you're a "heavy foot" type driver.
Fuel injection is just a plain better technology: better mileage, easier maintenance, runs better at steep angles....blah blah. You know this. Plus an FI engine will most likely come surrounded by all the rest of a newer Jeep.
Buy an old Jeep because they're cool, classic and represent something. Not because they're "better."