You should receive your schedule prior to the tournament.  In previous years we have had ~45-60 minutes between activities.  Normally you'll have 3 judging sessions (project, robot design, core values) and 4 table runs (practice + 3 competition rounds).  45-60 minutes sounds like a lot of time, but it goes quick!  If your team thinks they need to strategize, make sure they have a plan of attack, that they know which parameters they might need to change, etc.