yes, the north is a bit leery. it's the drugs, babe. but you could have bad luck anywhere remote in asia if you run into those guys. thing is, they don't want the hassle any more than you do. just be sensible and don't go where you're advised not to go.
the area is around oudom xai. i know there's an airport served by lao air nearby, but the drive up from luang prabang is super-cool, though you'll already know that 🙂
green discovery are the best for mtb tours around LP, Vientiane and Vang Vieng. good guys, good kit, though they happily leave slow riders behind to fend for themselves.
i'm off to scout a new area about 25 k's outside nha trang on wednesday if i can get a flight. remote in a designated eco-area. looks really good on paper. if you're in hcmc give me yell and you can come. at least aussies have sense of humour 🙂