The RHKYC organises a bi-annual race
to Na Trang. I've done it a couple of times.
The first one in 1996 or so and was a bit of a fiasco, with boats getting impounded, people not allowed ashore to provision for the trip back etc. The next try was in 2005? - (the same year as the Tsunami) - my first and this went OK. Local Gov't was behind it and welcome was very good. A cruise
afterwards was organised, but there were no takers. To my knowledge the cruise
was never tried again. The race has been a fairly regular fixture since then (last years was cancelled due to typhoon activity though)
I have heard of people stopping there (Na Trang) on deliveries or fuel
or shelter, but its big hassle, big money
- I wouldn't choose to do it.
Sunsail did (maybe still do?) take boats up there. I know they were having lots of legal
/ logistical problems. Not sure if they got them ironed out or are even still there.
There are a couple of expats in Na Trang who (at least used to) help out with the RHKYC race. I don't have there contacts, but I'm sure RHKYC will.
My view of Vietnam is that it is an absolute gem waiting to be opened up for cruising. It will happen, but for me the hassle factor is too high.
If someone like yourself is prepared to push the cause a little further, I take my hat off to you and hope that there are more like you out there.
Cambodia I have visited often, but have no experience of sailing there - I've not heard of anyone who has - I would expect it to be much more restrictive and it is most certainly much more dangerous, but your friend will know much better than I.
Weather NE monsoon in winter, SW monsoon in summer. Neither will stop you sailing the Cambodian coastline. I'd be much more worried about the natives. Lots of guns
, drugs and dead people in that little corner of Asia