Granted that's one of the world's greatest trucks, but it is 34 years old, so it's time to replace a ton of stuff on it before you take it into the hinterlands and bet your life on it. You didn't say what the mileage is. But, that aside, if you can deal with the available cab space for long trips, you can outfit the bed a million different ways to give you lots of room for a camping setup.
Heck yes - great truck for your purposes. But baseline the dickens out of it and check for rust in the frame!