As said above, based on advice from Darryl Cady... A Bladder tank isn't going to do what I want it to do. He suggested using Hayes or Dubro fuel tanks to run the Hopper tank setup.
I don't know who Darryl Cady is but he is flat wrong. Although I don't think a bladder tank is necessary, and wont help, it also won't hurt. Also a hopper or header tank won't help, but won't hurt. They are both used to insure a full flow of fuel is maintained for aerobatic manuvers, something you won't be doing.
See the attached link.
http://www.fraserker.com/heli/uniflo...flow_works.htm