Hi there, I spent a couple of weeks in Laos recently visiting Vientiane, Vang Vieng (sure that is not how to spell it) and Luang Prabang.
I was helped out a lot by a guy called Santi at Gay Laos Travel.
The websiste is www.wix.com/gradeaservices/laosgaytravel
They can help with transport, hotels, guides, interpreters - the whole thing.
If you are planning a visit (45minute flight from BKK) its worth seeing what they can do for you.
P