I'm not surprised you are having problems boking a hotel when you want to come out.
From June 19 to 23 Vancouver is hosting the third
World Urban Forum (WUF 3)
Its been in the works since 2002.
From a recent City Hall report: World Urban Forums are bi-annual international think-tanks on cities and urbanization. They are organized by the United Nations. The UN is responsible for determining WUF themes and the formal program. Countries offer to host World Urban Forums. Canada is the host for the WUF which will take place in Vancouver from June 19- 23, 2006.
Participation in WUF is open to all interested persons. There is no registration fee. To date over 8,000 people have registered to attend WUF 2006. Registrants are from around the world representing governments, universities, research institutions, civil society, nongovernmental organizations, private sector, and the media.