Leucs are cool!
I have a few leucs in my 150 extra tall tank and they move around the tank a good bit, going throught the "wooded" area of the tank as well as the open areas. They always sleep up toward the top in the back, so in my future tanks for leucs I'll always include some good hiding spots off the ground for them. Mine are very bold, even eating in front of my 5 year old that cant hold still!
My advice would be to give them a dense area in one part of the tank, and an open part in another. Give them a place to hide, and chances are, they'll be out to explore the rest.
Good luck!