Live performances: portastudio or what?

Flyer

Mechanical Voice
How do you think what is the best thing for live shows? I mean some sequencer or multi track player to playback an additional arrangements and voices, and mix it with a real band. First of all I need to send a click to drummer, than I need stereo track for additional arrangements and another stereo track for additional back vocals go directly to the mixing console. Need your advices. :) Mabe there is another way, than portastudio or laptop?
 
Click to the drummer? What for?

Most people I've talked to just take feeds from the FoH mixer and run them into their own interface, sometimes taking a DI from the guitar signal to later reamp, and sometimes trigger signals for obvious reasons.
 
I think he is talking about Backing tracks for the band. Not recording the show. A mini disc player seems to be the professional choice. They wont skip. I did a show where a guy used a cd and it started skipping on the bass booms. Not a good setup.