Thanks for all of the advice.
We're coming the second week of May to visit. The main purpose will be to make sure we will be happy there and to figure out where we can live. The area where I'll be working will eventually have a nice community near the plant site but my wife wants to understand where we'll be living until that's done.
I just sent an email to Flamingo travel to book hotels and possible do a one or two day tour via motorcycle. We just finished a tour of Baja, Mexico and Christina rode awesome. She's a great rider and I think we'll be fine.
We'll stay a few days in Hanoi, a few days in Ha Long, and where ever else we can find a decent place to stay.