Body off does not need to be concourse. I will find it 100 times easier to do my ute with the body off. It's not a huge job and you get a better result.
Do it how you want and in the way you enjoy. I thoroughly enjoyed pulling every bit of my XR500 apart and fixing it. All the previous owners had done patch up jobs.
The only time I would not recommend pulling things apart is if it's still in great original condition. That will just destroy a piece of history. Or if you know you won't commit to finishing it or you don't really have the ability to do all the mechanical work yourself.