None of the DLR tours are necessarily "back stage", meaning you won't get to see any behind the scenes stuff.
They do offer several different tours though, including
Welcome to Disneyland Tour
Walk in Walt's Footsteps Tour
Discover the Magic Tour (geared towards kids)
VIP Tour
Segway Tour in DCA
Halloween Tour (running through Oct. 31)
Holiday Tour (running Nov. 17-Jan 6)