MS Worlds hotel booking

For anyone who has already qualified and registered for MS Worlds, what is the mimimum number of hotel nights each team memebr has to book through the official website? Also is there a particular night that definitely has to be booked?

Well, the middle school Vex Worlds is from May 9-11, so assuming that you would be flying and getting there on the 8th and leaving on the 12th, you should probably book four nights with the Vex Team Travel Source.