During the first weekend in May the American Institute of Mathematics and Stanford University will be holing a conference to follow up their four month workshop the previous fall.
For finding accommodations you might find the following links useful:
For getting around the Stanford area while you are here you might want to use the free Stanford shuttle bus service (NOTE: this will only be useful on Friday since the shuttle does not operate over the weekend). If you will have a car Stanford maintains a web page with parking information. Several nice maps of Stanford are also available.