The same way they assembled it but in reverse:
- Build some holding jigs for the disassembled components
- Remove fluids
- Remove the engines
- Remove the wing floats
- Disconnect any hydraulic lines
- Disconnect electrical conduit at junctions
- Remove the empennage
- Remove flaps and ailerons from the wings
- Unbolt the wings
- Wrap everything up for moving and storage
- Hire some really, really big moving trucks
- Have caravan, will travel!