Did you take solely Dong with you?
I was thinking Dong in a small amount and the rest on US dollar cash card.
Has anybody seen that Top Gear episode about Vietnam? This thread is a bit like that.
Lots of dong. Lots.
Be careful it doesn't get wet in the rain though. No one likes a soppy dong.

I took Dong when I went last month.
Did this not work at expensive with conversion charges etc?
Did you take solely Dong with you?
I was thinking Dong in a small amount and the rest on US dollar cash card.
Did this not work at expensive with conversion charges etc?
Did this not work at expensive with conversion charges etc?

Slightly misleading. They'll accept notes that have been folded. But they most likely won't accept faded, dog-eared notes. I had no problems with any USDs when I was there. Unlike other South-East Asian countries (like Laos or Cambodia) where they predominantly use USD, in Vietnam they use dong (pronounced more like "dom").
Also, too late but a clarity card would have worked well for her.
I used a Caxton FX preload card, rates were very good and only charges were local ATM ones