You are pretty much free to go all around Seven Seas Lagoon and Bay Lake. You will encounter a few no wake zones and there is one area behind the Contemporary that is restricted because of the Sammy Duvall water sports area for parasailing and stuff. From what I remember, ropes will prevent you from going into restricted areas, so don't worry about drifting where you don't belong. You are also not allowed to get very close to the former Discovery Island because the water is very shallow. The patrol boats will let you know if you're getting too close. It is a big expansive area of water and except for those few exceptions, it's all yours!