Hi Jill,
I am booked for November and have been previously to Cambodia & Hanoi (the add on) but not to Laos. On my previous trip the main part of the tour was Vietnam with a few days in Cambodia at the end. Well Cambodia turned out to be the hidden gem - hence my return in November.
Last time I flew into Phnom Penh & then flew to Siem Reap & then flew out of the country. In Seam Reap we were close enough to the temple complex to see these from my hotel room window so did not travel far to see these. We did the overland trip to Tonie Sap lake which was a thoroughly enjoyable day and we got a stop or two to see local village life.
The attraction to me of this trip is that once we fly in then all movement is by ground transportation and looking at the itinery there are plenty of opportunities to see the countryside and meet the people all of whom I found very friendly.
Laos is new territory for me but again there looks to be plenty of opportunities to interact.
As to being in cities then they are not like western cities and I never felt oppressed by the hustle and bustle you get when going (for me) up to London for example. Crossing the road is a bit of an art as nothing stops (there were traffic lights in Hanoi that came in useful!) but it is mainly mopeds and as long as you keep walking you are ok! If in doubt look for a local crossing the road & keep him/her between you and the oncoming traffic!
Foodwise I have no dietary requirements and have mentioned a couple of places in an earlier post on this thread. The TM usually knows a place or two and part of the experience is the fun of eating out and savouring the atmosphere.
Anything more specific then do feel free to ask.
Ian