Just returned from 16 day tour, weather wasn’t kind approaching wet season so quite a few wet days. We had 4 tour guides, one was very good the others were too intent on giving us very old history and had no regard for the discomfort of traipsing through rain to look at old monuments. Wouldn’t recommend that you do the train trip from Hue to Hanoi, 13+ hours of rocking & rolling! All hotels were comfortable. Cooking class was hilarious.
All in all a good trip, but if you are not a good walker or find it hard to jump into various small boats then re-think this kind of trip