[QUOTE=DonB;413299]Was wondering about the need to strip out walls, ceiling and floor to add insulation.
Is this needed for a shuttle bus?/QUOTE]
It basically comes down to what you plan on doing with it.
Are you planning on a full time living arrangement, potentially venturing north of where you are in winter? Then yes, insulation will pay off. If you're simply using it in warm weathered areas, or just using on occasional weekends, then it might not be needed?
Anyhoo, when you figure out how, when, and where you'll be using it, more helpful advice might flow your way.
Good luck, and post pics if you can...