It would be fairly difficult and may need some hard discussions in the OOC beforehand. Failing to do so could end up with many complications with loosing control of the plot, conflicting characters and the risk of burning out quickly.

Take the example of a Bank siege. Without the right planning you could have all characters run to the safe. That's a factor that simply would not make sense in real life and would be immersion breaking.

All I can say is give it a shot, and see how it goes. May need a few runs to get the right formula/members.