Ecotourism is becoming a very important part of tourism in Laos in general,
and in our heart especially. Many agencies and companies are trying to keep the traditional Lao values and ecosystems alive. 
These websites are worth looking into for more information on ecotourism:
www.ecotourismlaos.com
www.ecpat.net 
http://www.gvnet.com/childprostitution/Laos.htm
www.bigbrothermouse.com

We recommend the following guide books to use on your travels in Laos:
Lonely Planet
Footprints
Fodors Guide
Frommers Guide
Stefan Loose (Deutch)
Le Guide du Routard (français)

About the weather in Luang prabang:
wunderground.com/Luang prabang

Accomodation around Chiang Mai
theheritagehg.com