I did a week trip there couple of years ago. Spent 3 nights at Hoi An and 2 nights at Hue.

My advice to those who are going:

1. Plan for 15th night in lunar calendar. They will switch off most of the lights near the river and you'll see lotsa lantern and elly tran ha.
2. Awesome place to be and good food too. Morning Glory and the baguette near the wet market is what i can think of right now
3. I stayed near the beach and most the hotels have shuttle to the town which is about 15 mins away.
4. As for Hue, take the scenic train from Danang. remember to sit on the window side facing the coast!
5. You don't really need to spend a lot of time in Hue, 1 night at least 2 nights at most. Its not big with most of the attraction are within bike ride distance. Their forbidden city was still under going major renovation the last time I was there, nothing spectacular imo. I prefer the summer palace more.

This post has been edited by Keng: Jan 26 2015, 02:04 PM

That's a very very tight schedule. My trip last time there was around 7-8 days.