Guys, Thanks for your inputs
- yes, you are right we are thinking of Saigon-Hanoi along coastline (Saigon-Hue and NinhBinh-Hanoi about 1200kms - skipping Hue to NinhBinh)
- a support/backup van + motorcycles - this is a good idea
yes, we are just a group of armature cyclists: we've tried 100kms /day for a whole week without a problem, and we still doing bush walking, back-packing, trekking (Nepal)...