Special to the Daily The Memorial Day holiday is seen as the unofficial start to the summer travel season, but not so much in Vail. Could that change in the wake of what’s expected to be a busy travel summer? With Eagle County’s public health order lifted only recently, there wasn’t any time to stage an event on such short notice. But those involved in creating Vail’s event portfolio say they’re still looking at what might boost Memorial Day business. Weather is the biggest wild card for Memorial Day. This weekend’s weather forecast calls for warm, dry conditions. But Memorial Day at 8,100 feet is just as likely to bring rain or snow.